Pinball is a type of arcade game, usually coin-operated, in which points are scored by a player manipulating one or more steel balls on a play field inside a glass-covered cabinet called a pinball machine. The primary objective of the game is to score as many points as possible. Points are earned when the ball strikes different targets on the play field. A drain is situated at the bottom of the play field, partially protected by player-controlled plastic bats called flippers. A game ends after all the balls fall into the drain. Secondary objectives are to maximize the time spent playing (by earning "extra balls" and keeping the ball in play as long as possible) and to earn bonus games (known as "replays").
- 1 History
- 1.1 Pre-modern: Development of outdoor and tabletop ball games
- 1.2 Late 1700s: Spring launcher invented
- 1.3 1869: Spring launchers become mainstream
- 1.4 1931: Coin operation introduced
- 1.5 1933: Electrification and active bumpers introduced
- 1.6 1947: Flippers introduced
- 1.7 1970s: Solid-state electronics and digital displays introduced
- 1.8 1980s and beyond: Pinball in the digital age
- 2 Pinball and gambling
- 3 Machine layout
- 4 Scoring points
- 5 Playing techniques
- 6 Competitions
- 7 Manufacturing process
- 8 Computer pinball simulation
- 9 Custom pinball machines
- 10 In popular culture
- 11 See also
- 12 References
- 13 External links
Pre-modern: Development of outdoor and tabletop ball games
The origins of pinball are intertwined with the history of many other games. Games played outdoors by rolling balls or stones on a grass course, such as bocce or bowls, eventually evolved into various local ground billiards games played by hitting the balls with sticks and propelling them at targets, often around obstacles. Croquet, golf and paille-maille eventually derived from ground billiards variants.
The evolving and specializing outdoor games finally led to indoor versions that could be played on a table, such as billiards, or on the floor of a pub, like bowling and shuffleboard. The tabletop versions of these games became the ancestors of modern pinball.
Late 1700s: Spring launcher invented
In France, during the long 1643–1715 reign of Louis XIV, billiard tables were narrowed, with wooden pins or skittles at one end of the table, and players would shoot balls with a stick or cue from the other end, in a game inspired as much by bowling as billiards. Pins took too long to reset when knocked down, so they were eventually fixed to the table, and holes in the bed of the table became the targets. Players could ricochet balls off the pins to achieve the harder scorable holes. A standardized version of the game eventually became known as bagatelle.
Somewhere between the 1750s and 1770s, the bagatelle variant Billard japonais 'Japanese billiards' was invented (in Western Europe, despite the name), which used thin metal pins and replaced the cue at the player's end of the table with a coiled spring and a plunger. The player shot balls up the inclined playfield toward the scoring targets using this plunger, a device that remains in use in pinball to this day, and the game was also directly ancestral to pachinko.
1869: Spring launchers become mainstream
In 1869, British inventor Montague Redgrave settled in the US and manufactured bagatelle tables in Cincinnati, Ohio. In 1871 Redgrave was granted US Patent #115,357 for his "Improvements in Bagatelle", another name for the spring launcher that was first introduced in Billard japonais. The game also shrank in size to fit atop a bar or counter. The balls became marbles and the wickets became small metal pins. Redgrave's popularization of the spring launcher and innovations in game design are acknowledged as the birth of pinball in its modern form.
1931: Coin operation introduced
By the 1930s, manufacturers were producing coin-operated versions of bagatelles, now known as "marble games" or "pin games". The table was under glass and used M. Redgrave's plunger device to propel the ball into the upper playfield. In 1931 David Gottlieb's Baffle Ball became the first hit of the coin-operated era. Selling for $17.50, the game dispensed five to seven balls for a penny. The game resonated with people wanting cheap entertainment in the Great Depression-era economy. Most drugstores and taverns in the US operated pinball machines, with many locations quickly recovering the cost of the game. Baffle Ball sold over 50,000 units and established Gottlieb as the first major manufacturer of pinball machines.
In 1932, Gottlieb distributor Ray Moloney found it hard to obtain more Baffle Ball units to sell. In his frustration he founded Lion Manufacturing to produce a game of his own design, Ballyhoo, named after a popular magazine of the day. The game became a smash hit. Its larger playfield and ten pockets made it more challenging than Baffle Ball, selling 50,000 units in 7 months. Moloney eventually changed the name of his company to Bally to reflect the success of this game. These early machines were relatively small, mechanically simple and designed to sit on a counter or bar top.
1933: Electrification and active bumpers introduced
The 1930s saw major advances in pinball design with the introduction of electrification. A company called Pacific Amusements in Los Angeles, USA produced a game called Contact in 1933. Contact had an electrically powered solenoid to propel the ball out of a bonus hole in the middle of the playfield. Another solenoid rang a bell to reward the player. The designer of Contact, Harry Williams, would eventually form his own company, Williams Manufacturing, in 1944. Other manufacturers quickly followed suit with similar features. Electric lights soon became a standard feature of all subsequent pinball games, designed to attract players.
By the end of 1932, there were approximately 150 companies manufacturing pinball machines, most of them in Chicago. Chicago has been the center of pinball manufacturing ever since. Competition among the companies was strong, and by 1934 there were 14 companies remaining.
During WWII, all of the major manufacturers of coin-operated games turned to the manufacture of equipment for the war effort. Some companies, like Williams, bought old games from operators and refurbished them, adding new artwork with a patriotic theme. At the end of the war, a generation of Americans looked for amusement in bars and malt shops, and pinball saw another golden age. Improvements such as the tilt mechanism and free games (known as replays) appeared.
1947: Flippers introduced
Gottlieb's Humpty Dumpty, introduced in 1947, was the first game to add player-controlled flippers to keep the ball in play longer, adding a skill factor to the game. The low power flippers required three pairs around the playfield to get the ball to the top.
Triple Action was the first game to feature just two flippers at the bottom of the playfield. Unlike in modern machines, the flippers faced outwards. These more powerful flippers were facilitated by the addition of a DC power supply. These innovations were some of many by designer Steve Kordek.
The first game to feature the familiar dual-inward-facing-flipper design was Spot Bowler, made by Gottlieb in 1950.
The post-war era was dominated by Gottlieb. Game designer Wayne Neyens, along with artist Leroy Parker, produced games that collectors consider some of the best classic pinball machines.
1970s: Solid-state electronics and digital displays introduced
The introduction of microprocessors brought pinball into the realm of electronic gaming. The electromechanical relays and scoring reels that drove games in the 1950s and 1960s were replaced in the 1970s with circuit boards and digital displays. The first solid-state pinball is believed to be Micro Games' Spirit of 76 (1976), though the first mainstream solid-state game was Williams' Hot Tip (1977). This new technology led to a boom for Williams and Bally, who attracted more players with games featuring more complex rules, digital sound effects, and speech.
The video game boom of the 1980s signaled the end of the boom for pinball. Arcades replaced rows of pinball machines with video games like 1978's Space Invaders, 1979's Asteroids, 1980's Pac-Man, and 1981's Galaga. These earned significantly greater profits than the pinball machines of the day, while simultaneously requiring less maintenance. Bally, Williams, and Gottlieb continued to make pinball machines, while they also manufactured video games in much higher numbers. Many of the larger companies were acquired by, or merged with, other companies. Chicago Coin was purchased by the Stern family, who brought the company into the digital era as Stern Enterprises, which closed its doors in the mid-1980s. Bally exited the pinball business in 1988 and sold their assets to Williams, who subsequently used the Bally trademark from then on for about half of their pinball releases.
While the video game craze of the late 1970s and early 1980s dealt a severe blow to pinball revenue, it did spark the creative talents within the industry. All companies involved tried to take advantage of the new solid state technology to improve player appeal of pinball and win back former players from video games. Some of this creativity resulted in landmark designs and features still present today. Some of these include speech, such as Williams' Gorgar; ramps for the ball to travel around, such as Williams' Space Shuttle; "multiball", used on Williams' Firepower; multi-level games like Gottlieb's Black Hole and Williams' Black Knight; and blinking chase lights, as used on Bally's Xenon. Although these novel features did not win back players as the manufacturers had hoped, they changed players' perception of pinball for coming decades.
1980s and beyond: Pinball in the digital age
After the collapse of the coin-operated video game industry, pinball saw another comeback in the 1990s. Some new manufacturers entered the field such as Capcom Pinball and Alvin G. and Company, founded by Alvin Gottlieb, son of David Gottlieb. Gary Stern, the son of Williams co-founder Sam Stern, founded Data East Pinball with funding from Data East Japan.
The games from Williams now dominated the industry, with complicated mechanical devices and more elaborate display and sound systems attracting new players to the game. Licensing popular movies and icons of the day became a staple for pinball, with Bally/Williams' The Addams Family hitting an all-time modern sales record of 20,270 machines. Two years later, Williams commemorated this benchmark with a limited edition of 1,000 Addams Family Gold pinball machines, featuring gold-colored trim and updated software with new game features. Other notable popular licenses included Indiana Jones: The Pinball Adventure and Star Trek: The Next Generation. Expanding markets in Europe and Asia helped fuel the revival of interest. Pat Lawlor was a designer, working for Williams until their exit from the industry in 1999. About a year later, Lawlor returned to the industry, starting his own company. working in conjunction with Stern Pinball to produce new games.
The end of the 1990s saw another downturn in the industry, with Gottlieb, Capcom, and Alvin G. closing by the end of 1996. Data East's pinball division was acquired by Sega and became Sega Pinball in 1996. By 1997, there were two companies left: Sega Pinball and Williams. In 1999, Sega sold their pinball division to Gary Stern (President of Sega Pinball at the time) who called his company Stern Pinball. By this time, Williams games rarely sold more than 4,000 units. In 1999, Williams attempted to revive sales with the Pinball 2000 line of games, merging a video display into the pinball playfield. The reception was initially good with Revenge From Mars selling well over 6,000 machines, but short of the 10,000-plus production runs for releases just six years earlier. The next Pinball 2000 game, Star Wars Episode I, sold only a little over 3,500 machines. Williams exited the pinball business to focus on making gaming equipment for casinos, which was more profitable. They licensed the rights to reproduce Bally/Williams parts to Illinois Pinball and the rights to reproduce full-sized machines to The Pinball Factory. Stern Pinball remained the only manufacturer of original pinball machines until 2013, when Jersey Jack Pinball started shipping The Wizard of Oz. Most members of the design teams for Stern Pinball are former employees of Williams.
In November 2005 The Pinball Factory (TPF) in Melbourne, Australia, announced that they would be producing a new Crocodile Hunter-themed pinball machine under the Bally label. With the death of Steve Irwin, it was announced that the future of this game was uncertain. In 2006 TPF announced that they would be reproducing two popular 90's era Williams machines, Medieval Madness and Cactus Canyon. TPF however was unable to make good on its promises to produce new machines, and in October 2010 transferred its Williams Electronics Games licenses as well as its pinball spare parts manufacturing and distribution business to Planetary Pinball Supply Inc, a California distributor of pinball replacement parts.
In 2013, Jersey Jack Pinball, Inc. released The Wizard of Oz pinball machine. It is the first pinball machine with a LCD as backbox, the first widebody pinball machine since 1994 and the first new pinball machine not made by Stern Pinball since 2001.
Pinball and gambling
Pinball machines, like many other mechanical games, were sometimes used as gambling devices. Some pinball machines, such as Bally's "bingos", featured a grid on the backglass scoring area with spaces corresponding to targets or holes on the playfield. Free games could be won if the player was able to get the balls to land in a winning pattern; however, doing this was nearly random, and a common use for such machines was for gambling. Other machines allowed a player to win and accumulate large numbers of "free games" which could then be cashed out for money with the location owner. Later, this type of feature was discontinued in an effort to legitimize the machines, and to avoid legal problems in areas where awarding free games was considered illegal, some games, called Add-A-Ball, did away with the free game feature, instead giving players extra balls to play (between 5 and 25 in most cases). These extra balls were indicated via lighted graphics in the backglass or by a ball count wheel, but in some areas that was disallowed, and some games were shipped with a sticker to cover the counters.
Pinball was banned beginning in the early 1940s until 1976 in New York City. New York mayor Fiorello La Guardia was responsible for the ban, believing that it robbed school children of their hard earned nickels and dimes. La Guardia spearheaded major raids throughout the city, collecting thousands of machines. The mayor participated with police in destroying machines with sledgehammers before dumping the remnants into the city's rivers.
The ban ended when Roger Sharpe (a star witness for the AMOA – Amusement and Music Operators Association) testified in April 1976 before a committee in a Manhattan courtroom that pinball games had become games of skill and were not games of chance, that is, gambling. He began to play one of two games set up in the courtroom, and – in a move he compares to Babe Ruth's home run in the 1932 World Series – called out precisely what he was going to shoot for, and then proceeded to do so. Astonished committee members reportedly voted to remove the ban, which was followed in other cities. (Sharpe reportedly acknowledges his courtroom shot was by sheer luck.)
Like New York, Los Angeles banned pinball machines in 1939. The ban was overturned by the Supreme Court of California in 1974 because (1) if pinball machines were games of chance, the ordinance was preempted by state law governing games of chance in general, and (2) if they were games of skill, the ordinance was unconstitutional as a denial of the equal protection of the laws. Although it was rarely enforced, Chicago's ban on pinball lasted three decades and ended in 1973. Philadelphia and Salt Lake City also had similar bans. Regardless of these events, some towns in America still have such bans on their books 50 years later, and several countries still ban the games and their rewards. More recent games are clearly labeled "FOR AMUSEMENT ONLY" in an attempt to emphasize their legitimate, legal nature.
Another close but distinct relative of pinball is pachinko, a gambling game played in Japan. Although they share a common ancestry, the games are very different, in that pachinko involves shooting many small balls repeatedly into a nearly vertical playfield, while pinball is about the manipulation of the small number of balls currently in play on a near-horizontal playfield.
The key attribute of a successful pinball game is an interesting and challenging layout of scoring opportunities on the playfield. Many types of targets and features have been developed over the years.
The playfield is a planar surface inclined upward from three to seven degrees (current convention is six and a half degrees), away from the player, and includes multiple targets and scoring objectives. Some operators intentionally extend (to raise) threaded levelers on the rear legs and/or shorten or remove the levelers on the front legs to create additional incline in the playfield, making the ball move faster and harder to play. It is important that the playfield be level left-to-right; a quick visual test compares the top of the back cabinet against a brick or block wall behind it, or to roll a marble down the center of the playfield glass. If it clearly rolls off to one side, a player may be inclined to stuff folded paper beneath the legs on the lower side to level the playfield. Additionally, leg levelers that are all extended fully make the game easier to nudge; when collapsed low, the entire game is more stable, and nudging becomes harder. A game that is fun to play makes more money for the owner; a game that is faulty does not get repeat customers.
The ball is put into play by use of the plunger, a spring-loaded rod that strikes the ball as it rests in an entry lane, or as in some newer games, by a button that signals the game logic to fire a solenoid that strikes the ball. With both devices the result is the same: The ball is propelled upwards onto the playfield. Once a ball is in play, it tends to move downward towards the player, although the ball can move in any direction, sometimes unpredictably, due to contact with objects on the playfield or by the player's own actions. To return the ball to the upper part of the playfield, the player makes use of one or more flippers. Manipulation of the ball may also be accomplished by nudging (physically pushing the cabinet). However, excessive nudging is generally penalized by the loss of the current player's turn (known as tilting) or ending of the entire game when the nudging is particularly violent (known as slam tilting). This penalty was instituted because nudging the machine too much may damage it. Many games also have a slam tilt in the bottom of the lower cabinet to end the game if the cabinet is raised and dropped to the floor in an attempt to falsely trigger the coin counting switch.
The plunger is a spring-loaded rod with a small handle, used to propel the ball into the playfield. The player can control the amount of force used for launching by pulling the plunger a certain distance (thus changing the spring compression). This is often used for a "skill shot," in which a player attempts to launch a ball so that it exactly hits a specified target. Once the ball is in motion in the main area of the playfield, the plunger is not used again until another ball must be brought onto the playfield. In modern machines, an electronically controlled launcher is sometimes substituted for the plunger. The button that replaces the plunger may be modified to look like the trigger of a gun.
The flippers are one or more small mechanically or electromechanically controlled levers, roughly 3 to 7 cm in length, used for redirecting the ball up the playfield. They are the main control that the player has over the ball. Careful timing and positional control allows the player to intentionally direct the ball in a range of directions with various levels of velocity. With the flippers, the player attempts to move the ball to hit various types of scoring targets, and to keep the ball from disappearing off the bottom of the playfield. The very first pinball games appeared in the early 1930s and did not have flippers; after launch the ball simply proceeded down the playfield, directed by static nails (or "pins") to one of several scoring areas. (These pins gave the game its name.) In 1947, the first mechanical flippers appeared on Gottlieb's Humpty Dumpty and by the early 1950s, the familiar two-flipper configuration, with the flippers at the bottom of the playfield above the center drain, had become standard. Some machines also added a third or fourth flipper midway up the playfield.
The new flipper ushered in the "golden age" of pinball, where the fierce competition between the various pinball manufacturers led to constant innovation in the field. Various types of stationary and moving targets were added, spinning scoring reels replaced games featuring static scores lit from behind. Multiplayer scores were added soon after, and then bells and other noise-makers, all of which began to make pinball less a game and more of an experience. The flippers have loaned pinball its common name in many languages, where the game is known mainly as "flipper".
Bumpers are round knobs that, when hit, will actively push the ball away. There is also an earlier variety of bumper (known as a dead bumper or passive bumper) that doesn't propel the ball away; most bumpers on machines built since the 1960s are active bumpers, variously called "pop bumpers," "thumper bumpers," "jet bumpers," or "turbo bumpers." Most recent games include a set of pop bumpers, usually three, sometimes more or fewer depending on the designer's goals. Bumpers predate flippers, and active bumpers added a great deal of spice to older games.
Pop bumpers are operated by a switch connected to a ring surrounding the bottom circumference of the bumper that is suspended several millimeters above the playfield surface. When the ball rolls over this ring and forces one side of it down, a switch is closed that activates the bumper's solenoid. This pulls down a tapered ring surrounding the central post of the bumper that pushes downward and outward on the ball, propelling it away.
Kickers and slingshots
Kickers and slingshots are rubber pads which propel the ball away upon impact, like bumpers, but are usually a horizontal side of a wall. Every recent pinball machine includes slingshots to the upper left and upper right of the lowest set of flippers; older games used more experimental arrangements. They operate similarly to pop bumpers, with a switch on each side of a solenoid-operated lever arm in a typical arrangement. The switches are closed by ball contact with the rubber on the face of the kicker and this activates the solenoid.
Early pinball machines typically had full solenoid current passing through trigger switches for all types of solenoids, from kickers to pop bumpers to the flippers themselves. This caused arcing across switch contacts and rapid contact fouling and failure. As electronics were gradually implemented in pinball design, solenoids began to be switched by power transistors under software control to lower switch voltage and current, vastly extend switch service lifetime, and add flexibility to game design.
As an example, some later machines had flippers that could be operated independently of the flipper button by the machine's software. The upper-left flipper during "Thing Flips" on The Addams Family pinball machine triggers automatically a brief moment after the ball passes an optical sensor just above the flipper.
The smaller, lower-powered solenoids were first to be transistorized, followed later by the higher-current solenoids as the price, performance, and reliability of power transistors improved over the years.
- Stationary Targets: These are static targets that simply record when a ball strikes them. These are generally the simplest playfield elements. They are also known as spot targets or standup targets.
- Bullseye Targets: These are static targets that have two concentric elements, similar to a stationary target. Hitting the outer ring usually scores lower than hitting the center bull's eye. They are found mostly on older electro-mechanical games.
- Drop targets: These are targets that drop below the playfield when hit. Eliminating an entire row in this manner may lead to any of various features. Once an entire bank of drop targets is hit, the bank may reset or pop back up. Alternatively, the drop targets can be placed in front of other targets, requiring the drop target to be knocked down before the targets behind can be hit, or the drop target may only pop up at specific times to deny the player the ability to shoot the ball into whatever is behind it. If used in the latter way, the target is usually blocking a lane or ramp.
- Kicking Target: Used rarely, these targets look like stationary targets, but when hit they kick the ball away in the opposite direction much like a slingshot or bumper.
- Vari-Target: These targets reward a different amount of points depending on how hard the target was hit. It is a metal arm that pivots under the playfield. When a ball hits it, it ratchets back sometimes, resetting immediately or resetting only after it is hit all the way back. A large sum of points is usually rewarded when the target is hit back all the way with one strike of the ball.
Holes and saucers
- Holes: The player directs the ball into a hole. On modern games, there are both vertical and horizontal holes (also called scoops), and the game may include mechanisms to move the ball between them. On some older games, a "gobble hole" is sometimes included, usually awarding a large bonus or a game feature, but not giving the ball back.
- Saucers: A shallow hole with a kicker inside. The ball remains visible on the playfield and is kicked out either straight up (usually into a duct or rail chute) or sideways back onto the playfield.
Originally holes and saucers worked by using tubes behind the playing field, with a pin at the top to hold the ball for later drops. Another version of the tube uses two spinning wheels to transfer the ball from hole to hole. Newer versions use an electronic track with a carriage or an electromagnet to pull the ball between holes.
Spinners and rollovers
- Spinners: A ball can push through a flat surface that is hinged in the middle, causing it to spin; each rotation adds points.
- Rollovers: These are targets activated when a ball rolls over them. Often a series of rollover targets are placed side-by-side and with dividers between them forming "lanes"; the player must guide the ball to particular lanes (or to all lanes) in order to complete an objective. Such lanes are frequently placed at the bottom sides of the playfield: "inlanes" feed the ball back to the flippers, "outlanes" cause the ball to immediately drain. On many machines, outlanes can have extra balls or "specials" lit to act in the same role as the older gobble holes.
- Whirlwind Spinner(s): Used in some games, a whirlwind spinner is a rapidly rotating (often rubberized) disk on the playfield that momentarily "grabs" the ball and throws it in a random direction. Some games couple a whirlwind spinner with a magnet placed in the center, although DataEast seems to be the only manufacturer to do so. Bally's "Fireball" and Chicago Coin's "Casino" were popular games with a whirlwind spinner.
Switches, gates, and stoppers
- Switch: A switch is an area that is blocked off after the ball passes through it once. An example of this is the initial firing lane: as a ball passes through the firing lane, it hits a switch and cannot reenter that chute.
- Gate: This is a block that will allow balls to come through one way but will block the ball if it is going the other way.
- Stopper: Also called a magic post, this is a small pole most often found centered between and just below the lowest set of flippers and also rarely next to the outlanes. When activated (typically by hitting a specific target or targets), the pole ascends from inside the machine, blocking the area between the flippers for a limited time, making it more difficult to drain and lose the ball. After time expires, it returns to its resting place just below the playfield.
Ramps are inclined planes with a gentle enough slope that the ball may travel along it. The player attempts to direct the ball with enough force to make it to the top of the ramp and down the other side. If the player succeeds, a "ramp shot" has been made. Ramps frequently end in such a way that the ball goes to a flipper so one can make several ramp shots in a row. Often, the number of ramp shots scored in a game is tallied, and reaching certain numbers may lead to various game features. At other times, the ramps will go to smaller "mini-playfields" (small playfields, usually raised above the main game surface, with special goals or scoring).
Toys, magnets and captive balls
- Toys: Toys are various items on, above, or beneath the playfield (items beneath the playfield visible through windows) or attached to the cabinet (usually to the backbox). Usually, each toy is unique to the machine it was made for, and reflects the theme of the game. They may be visual only, and have no effect on game play; they may be alternate ways of performing common game functions (for example, instead of using a drop hole to hold the ball, a hand or claw might reach out, grab the ball, and capture it that way); or they may be an integral part of the game rules and play (for instance, having a smaller playfield over the main playfield that can be tilted right and left by the player, using the flipper buttons).
- Electromagnets: Some machines feature electrically operated magnets below the playfield to affect the ball's speed and/or trajectory according to the current state of game play. This may be done to make the ball's movement unpredictable, to temporarily halt the ball (as a ball saver, for example), or to otherwise control the ball by non-mechanical means. Electromagnets may also be used in above-playfield elements (often as part of the playfield toys) to grab the ball and move it elsewhere (onto a mini-playfield, for example). The Williams machine The Twilight Zone featured a mini-playfield that used electromagnets controlled by the flipper buttons, allowing the player to flip the ball on the mini-playfield, essentially working as invisible flippers. Contrary to somewhat popular myth, there are no professionally produced pinball machines known to contain magnets under the playfield intended to clandestinely make game play harder or increase ball losses.
- Captive balls: Sometimes a ball is allowed to move around only within a confined area. A typical application of this is having a short lane on the playfield with a narrow opening, inside which a captive ball is held. The player can strike this captive ball with the ball in play, pushing it along the lane to activate a rollover switch or target. In games such as Theatre of Magic, captive balls sometimes have what's called a "Newton Ball," which is a stationary ball adjacent to a free ball in a small lane. The ball being played strikes the Newton ball which, in turn, transfers its momentum to the adjacent ball, which causes it to move.
There are other idiosyncratic features on many pinball playfields. Pinball games have become increasingly complex and multiple play modes, multi-level playfields, and even progression through a rudimentary "plot" have become common features on recent games. Pinball scoring objectives can be quite complex and require a series of targets to be hit in a particular order. Recent pinball games are distinguished by increasingly complex rule sets that require a measure of strategy and planning by the player for maximum scoring. Players seeking highest scores would be well-advised to study the placard (usually found in the lower-left corner of the playfield) to learn each game's specific patterns required for these advanced features and scoring.
Common features in modern pinball games include the following:
- Ball lock: Each time a ball goes into a specific hole or target, it is locked, and a new ball appears at the plunger. When the player has locked the required number of balls (often three), the multiball feature starts. On some games, the balls are physically locked in place by solenoid-actuated gates, but many newer machines use virtual ball locks instead, in which the game merely keeps count of the number of locked balls and then auto-launches them from the main ball trough when it is time for them to be released.
- Multiball: This occurs when there is more than one ball in play at a time and usually includes some kind of jackpot scoring. Multiball ends when all but one ball is lost down the bottom of the playfield, and then regular play resumes.
- Jackpot: Some targets on the playfield increase the scoring value of something else, which could be as simple as hitting a ramp, or a complicated sequence of targets. Upon their inception, the jackpot was the main goal of most pinball machines in the 1980s. Jackpots would often range from one to four million (back when this was a significant addition to the score), and their value would accrue between games until it was scored. Scoring it was usually a complicated task. Modern games often dilute the meaning of "jackpot". Modern games give off several jackpots in each multiball mode, which is usually quite easy to attain, and the value of today's jackpots is far less significant. Many jackpots awarded during special modes often do not increase at all, but are instead simply fixed-value bonuses.
- End-of-ball bonus: After each ball is played, the player scores bonus points depending on how many times certain features have been activated or the amounts of items that the player may obtain. Some games award a seemingly arbitrary amount of points that depend on the number of times any switch has been hit. Virtually all games have the ability to assign a multiplier to the bonus. Most games cap the bonus multiplier at 5x or 10x, although more modern games apparently have no limit.
- Extra ball: If a player has earned this, when they lose a ball they get another one to play immediately afterward and the machine does not count the lost ball towards the limit of balls for that game. For example, if the player were on ball two and they earn an extra ball, the next ball will still be counted as ball two instead of the third ball. When a machine says "SHOOT AGAIN" on the scoreboard, it signifies that an extra ball will shoot. In a multiplayer game, the player who just lost the ball is the same one to shoot again.
- Various timed rounds (modes): For example, if the player hit a specific target three times within the next 20 seconds, they might score several tens of millions of points for it. There are many and various time-related features in pinball. Progression through each mode is frequently accompanied by DMD animations and sound.
- Stackability: To stack means that the player can run one play mode while another mode is in progress. This strategy usually yields higher scores. A noted example of this is Williams' Bram Stoker's Dracula, with its Multi-Multiball feature.
- Wizard Mode: This is a special scoring mode, which is reached after meeting certain prerequisites to access this mode (e.g., finishing all modes). This is the pinball equivalent of the final boss fight in video games. Classic examples of this include Williams' Black Knight 2000 (The King's Ransom) and Midway's Twilight Zone (Lost in the Zone). Named after The Who's song "Pinball Wizard". Wizard modes come in two varieties: goal-oriented types where the player receives a huge amount of points after completing a specific task, or multiball modes with 4–6 balls in play, and virtually every feature active. Some games offer both and award the latter as a condition for completing the former.
- Ball Index: Many modern games include a feature that prevents a player from being disappointed if a ball sent into play quickly drains before substantial points have been added. This player will immediately be given another (free) ball to compensate. Electromechanical games made during the 1970s had a similar Ball Index switch system that returned a drained ball if no points were made.
- Slam Tilt: There are special tilt switches placed on the underside of the playfield, on the coin door, and (on electromechanical games) in the lower cabinet and upper cabinet, designed to prevent cheating. If a player lifts and drops, pounds, or kicks the machine and activates any slam tilt, the entire game ends immediately for all players and may go into a reset/reboot mode. These are also used on video games. A similar Incline Tilt prevents a player from lifting the front of the cabinet to tip the ball back up the playfield by ending his turn.
In the 1990s, game designers often put hidden, recurring images or references in their games, which became known as Easter eggs. For example, Williams' designers hid cows in the video displays of the games, and Pat Lawlor would place a red button in the artwork of games he developed. The methods used to find the hidden items usually involved pressing the flipper buttons in a certain order or during specific events.
Designers also included hidden messages or in-jokes; one example of this is the phrase "DOHO" sometimes seen quickly displayed on the dot matrix displays, a reference to Dorris Ho, the wife of then-Williams display artist Scott "Matrix" Slomiany. DOHO was popularly thought to be an acronym for Documented Occurrence of a Hidden Object until its true meaning was revealed in a PinGame Journal article on the subject. The game Star Trek:The Next Generation went so far as to embed a hidden Breakout-like game, available only after a complex sequence of events had been accomplished during the game.
The backglass is a vertical graphic panel mounted on the front of the backbox, which is the upright box at the top back of the machine. The backglass contains the name of the machine, eye-catching graphics, (usually) the score displays (lights, mechanical wheels, digital displays, or a dot matrix display depending on the era), and sometimes a mechanical device tied to game play, for example, elevator doors that opened on an image or a woman swatting a cat with a broom such as on Williams' 1989 "Bad Cats". For older games, the backglass image is screen printed in layers on the reverse side of a piece of glass; in more recent games, the image is imprinted into a translucent piece of plastic-like material called a translite which is mounted behind a piece of glass and which is easily removable. The earliest games did not have backglasses or backboxes and were little more than playfields in boxes. Games are generally built around a particular theme, such as a sport or character and the backglass art reflects this theme to attract the attention of players. Recent machines are typically "tied-in" to other enterprises such as a popular film series, toy, or brand name. The entire machine is designed to be as eye-catching as possible to attract players and their money; every possible space is filled with colorful graphics, blinking lights, and themed objects, and the backglass is usually the first artwork the players see from a distance. Since the artistic value of the backglass may be quite impressive, it is not uncommon for enthusiasts to use a deep frame around a backglass (lighted from behind) and hang it as art after the remainder of the game is discarded.
Contact with or manipulation of scoring elements (such as targets or ramps) scores points for the player. Electrical switches embedded in the scoring elements detect contact and relay this information to the scoring mechanism. Older pinball machines used an electromechanical system for scoring wherein a pulse from a switch would cause a complex mechanism composed of relays to ratchet up the score. In later games these tasks have been taken over by semiconductor chips and displays are made on electronic segmented or dot-matrix displays (DMD). The first DMD on a pinball machine was used by Checkpoint and features also video mode minigames. The Wizard of Oz is the first pinball machine that used a LCD in the back box not only for scoring and mini-games but also to display full color videos . Other display innovations on pinball machines include pinball video game hybrids like Baby Pac-Man in 1982 and Granny and the Gators in 1984 and the use of a small color video monitor for scoring and minigames in the backbox of the pinball machine Dakar from manufacturer Mr. Game in 1988 and CGA color monitors in Pinball 2000 in 1999 that utilizes a Pepper's Ghost technique to reflect the monitor in the head of the as well as modifications by the use of ColorDMD that is used to replace the standard mono color DMDs.
Pinball scoring can be peculiar and varies greatly from machine to machine. During the 1930s and the 1940s, lights mounted behind the painted backglasses were used for scoring purposes, making the scoring somewhat arbitrary. (Frequently the lights represented scores in the hundreds of thousands.) Then later, during the 1950s and 1960s when the scoring mechanism was limited to mechanical wheels, high scores were frequently only in the hundreds or thousands. (Although, in an effort to keep with the traditional high scores attained with the painted backglass games, the first pinball machines to use mechanical wheels for scoring, such as Army Navy, allowed the score to reach into the millions by adding a number of permanent zeros to the end of the score.) The average score changed again in the 1970s with the advent of electronic displays. Average scores soon began to commonly increase back into tens or hundreds of thousands. Since then, there has been a trend of scoring inflation, with modern machines often requiring scores of over a billion points to win a free game. At the peak of this trend, two machines, Johnny Mnemonic and Attack from Mars, have been played into the trillions. Another recent curiosity is the 1997 Bally game NBA Fastbreak which, true to its theme, awards points in terms of a real basketball score: Each successful shot can give from one to three points. Getting a hundred points by the end of a game is considered respectable, which makes it one of the lowest scoring pinball machines of all time. The inflated scores are the source of one of the Spanish-language names of pinball machines, máquina del millón ("million machine").
- High score lists: If a player attains one of the highest scores ever (or the highest score on a given day), he is invited to add his initials to a displayed list of high-scorers on that particular machine. "Bragging rights" associated with being on the high-score list are a powerful incentive for experienced players to master a new machine.
Pinball designers also entice players with the chance to win an extra game or replay. Ways to get a replay might include the following:
- Replay Score: An extra game is rewarded if the player exceeds a specified score. Some machines allow the operator to set this score to increase with each consecutive game in which the replay score is achieved, in order to prevent a skilled player from gaining virtually unlimited play on one credit by simply achieving the same replay score in every game.
- Special: A mechanism to get an extra game during play is usually called a "special." Typically, some hard-to-reach feature of the game will light the outlanes (the areas to the extreme left and right of the flippers) for special. Since the outlanes always lose the ball, having "special" there makes it worth shooting for them (and is usually the only time, if this is the case).
- Match: At the end of the game, if the last two digits of the player's score match a random digit followed by zero, an extra game is rewarded. As pinball scores on modern machines nearly always end in zero, the chances of this happening appear to be 1 in 10, but the operator can alter this probability – the default is usually 7% in all modern Williams and Bally games for example. Other non-numeric methods are sometimes used to award a match. In earlier machines, before a phenomenon often referred to as score inflation, had happened (causing almost all scores to end in 0) and scores could end in any integer, the match function was often a random integer from 0 to 9 that had to match the last digit in the score.
- High Score: Most machines award 1–3 bonus games if a player gets on the high score list. Typically, one or two credits are awarded for a 1st–4th place listing, and three for the Grand Champion.
When an extra game is won, the machine typically makes a single loud bang, most often with a solenoid that strikes a piece of metal, or the side of the cabinet, with a rod, known as a knocker, or less commonly with loudspeakers. "Knocking" is the act of winning an extra game when the knocker makes the loud and distinctive noise.
The primary skill of pinball involves application of the proper timing and technique to the operation of the flippers, nudging the playfield when appropriate without tilting, and choosing targets for scores or features. A skilled player can quickly "learn the angles" and gain a high level of control of ball motion, even on a machine they have never played. Skilled players can often play on a machine for long periods of time on a single coin. By earning extra balls, a single game can be stretched out for a long period, and if the player is playing well he or she can earn replays known as "specials."
A placard is usually placed in a lower corner of the playfield. It may simply show pricing information, but should also show critical details about special scoring techniques. This information is vital to achieving higher scores; it typically describes a series of events that must take place (e.g., shoot right ramp and left drop targets to light 'extra ball' rollover). Learning these details makes the game more fun and challenging. With practice — and a machine in good operating condition — a player can often achieve specific targets and higher scores and trigger exciting events.
Skillful players can influence the movement of the ball by nudging or bumping the pinball machine, a technique known as "nudging." There are tilt mechanisms which guard against excessive manipulation of this sort. The mechanisms generally include:
- a grounded plumb bob centered in an electrified metal ring – when the machine is jostled or shaken too far or too hard, the bob contacts the ring, completing a circuit. The bob is usually cone-shaped allowing the operator to slide it vertically, controlling the sensitivity;
- an electrified ball on a slight ramp with a grounded post at the top of the ramp – when the front of the machine is lifted (literally, tilted) too high, the ball rolls to the top of the ramp and completes the circuit; and
- an impact sensor – usually located on the coin door, the playfield and/or the cabinet itself.
When any of these sensors is activated, the game registers a "tilt" and locks out, disabling solenoids for the flippers and other playfield systems so that the ball can do nothing other than roll down the playfield directly to the drain. A tilt will usually result in loss of bonus points earned by the player during that ball. Older games would immediately end the ball in play on a tilt. Modern games give tilt warnings before sacrificing the ball in play. The number of tilt warnings can be adjusted by the operator of the machine. Until recently most games also had a "slam tilt" switch which guarded against kicking or slamming the coin mechanism, or for overly aggressive behavior with the machine, which could give a false indication that a coin had been inserted, thereby giving a free game or credit. This feature was recently taken out by default in new Stern S.A.M System games, but can be added as an option. A slam tilt will typically end the current game for all players.
Skilled players can also hold a ball in place with the flipper, giving them more control over where they want to place the ball when they shoot it forward. This is known as trapping. This technique involves catching the ball in the corner between the base of the flipper and the wall to its side, just as the ball falls towards the flipper; the flipper is then released, which allows the ball to roll slowly downward against the flipper. The player then chooses the moment to hit the flipper again, timing the shot as the ball slides slowly against the flipper. Multi-ball games, in particular, reward trapping techniques. Usually this is done by trapping one or more balls out of play with one flipper, then using the other flipper to score points with the remaining ball or balls.
Once a player has successfully trapped a ball, they may then attempt to "juggle" the ball to the other flipper. This is done by tapping the flipper button quickly enough so that the trapped ball is knocked back at an angle of less than 90 degrees into the bottom of the nearest slingshot. The ball will then often bounce across the playfield to the other flipper, where the ball may then be hit (or trapped) by the opposite flipper.
Occasionally a pinball machine will have a pin or post placed directly between the two bottom flippers. When this feature is present, the advanced player may then attempt to perform a "chill maneuver" when the ball is heading directly toward the pin by opting not to hit a flipper. If successful, this will cause the ball to bounce up and back into play. A related move, the "dead flipper pass," is performed by not flipping when a ball is heading toward a flipper. If done properly, the ball will bounce off the "dead" flipper, across to the other flipper, where it may be trapped and controlled.
Two Pinball World Championships were held in the Washington, DC area in 1972 and 1973 under the auspices of the World Pinball Association which also published a newsletter carrying results of regional tournaments.
In 1974, students at Jersey City State College wanted to make pinball playing a varsity school sport, like football was, so they started a Pinball Club Team to compete against clubs at other schools. They asked two other schools to participate. St. Peter's College took up the challenge, while the other school did not.
Many pinball leagues have formed, with varying levels of competitiveness, formality and structure. These leagues exist everywhere from the Free State Pinball Association (FSPA) in the Washington, DC area to the Tokyo Pinball Organization (TPO)] in Japan. In the late 1990s, game manufacturers added messages to some games encouraging players to join a local league, providing website addresses for prospective league players to investigate.
Competitive pinball has become increasingly popular in recent years, with the relaunch of both the Professional and Amateur Pinball Association (PAPA) and the International Flipper Pinball Association (IFPA).
Two different systems for ranking pinball players exist. The World Pinball Player Rankings (WPPR) was created by the IFPA. The WPPR formula takes into account the quantity and quality of the players in the field, and awards points based on that calculation for the nearly 200 IFPA endorsed events worldwide. PAPA manages a ranking system known as the PAPA Advanced Rating System (PARS), which uses the Glicko Rating System to mathematically analyze the results of more than 100,000 competitive matches. Since 2008 the IFPA has held a World Championship tournament, inviting the top-ranked WPPR players to compete; the current title holder is Daniele Celestino Acciari of Italy.
PAPA also designates the winner of the A Division in the annual PAPA World Pinball Championships as the World Pinball Champion; the current holder of this title is Keith Elwin from the USA. Current Junior (16 and under) and Senior (50 and over) World Champions are Joshua Henderson and Paul McGlone, respectively.
||This section's tone or style may not reflect the encyclopedic tone used on Wikipedia. (February 2010)|
The first part of a pinball machine's construction involves the wiring for the game's electronic system. A color-coded wiring arrangement is wrapped around pins and connectors on a circuit board. Technicians then follow through using a meticulous set of instructions to ensure that the almost-half mile of wire is engineered properly. During this time the playing field is set onto foam strips and a bed of nails. The nails are then pressed in the playing board as the bed raises and compresses them against the header. Afterward anchors come and are hammered into place. The anchors help secure a metal railing that keeps the balls from exiting the playing field.
After the main construction is processed, it then comes down to fitting a few lampposts, some plastic bumpers, and flashing lights. All of the wiring is permanently fastened and speakers are bolted into the cabinet. Along with this comes the most crucial tool, the spring power plunger, which is set into place.
Finally, a few other toys and gimmicks are added, such as toy villains and other small themed characters. Once everything is tested and seems to be running alright, the playfield is set on top of the lower box. The lower box on computerized games is essentially empty. On older electromechanical games, the entire floor of the lower box was used to mount custom relays and special scoring switches, making older games much heavier. To protect the top of the playfield, a tempered glass window is installed, secured by a metal bar that is locked into place. The expensive, unique, painted vertical backglass is fragile. The backglass covers the custom microprocessor boards on newer games, or electromechanical scoring wheels on older games. On older games, a broken backglass might be impossible to replace, ruining the game's appeal.
- Solenoids or coils: These are found in every modern pinball machine since the flipper age. They are usually hidden under the playfield, or covered by playfield components. By applying power to the coil, the magnetic field created by electromagnetism causes a metal object (usually called a plunger) to move. The plunger is then connected mechanically to a feature or accessory on the playfield.
Flipper solenoids contain two coil windings in one package; a short, heavy gage 'power' winding to give the flipper its initial thrust up, and a long, light gage 'hold' winding that uses lower power (and creates far less heat) and essentially just holds the flipper up allowing the player to capture the ball in the inlane for more precise aiming. As the flipper nears the end of its upward travel, a switch under the flipper disconnects the power-winding and leaves only the second sustain winding to hold the flipper up in place. If this switch fails 'open' the flipper will be too weak to be usable, since only the weak winding is available. If it fails 'closed' the coil will overheat and destroy itself, since both windings will hold the flipper at the top of its stroke.
Solenoids also control pop-bumpers, kickbacks, drop target resets, and many other features on the machine. These solenoid coils contain a single coil winding. The plunger size and wire gage & length are matched to the strength required for each coil to do its work, so some types are repeated throughout the game, some are not.
All solenoids and coils used on microprocessor games include a special reverse-biased diode to eliminate a high-voltage pulse of reverse EMF (electromotive force). Without this diode, when the solenoid is de-energized, the magnetic field that was built up in the coil collapses and generates a brief, high-voltage pulse backward into the wiring, capable of destroying the solid-state components used to control the solenoid. Proper wiring polarity must be retained during coil replacement or this diode will act as a dead short, immediately destroying electronic switches. Older electromechanical game solenoids do not require this diode, since they were controlled with mechanical switches.
All but very old games use low DC voltages to power the solenoids and electronics (or relays). Some microprocessor games use high voltages (potentially hazardous) for the score displays. Very early games used low-voltage AC power for solenoids, requiring fewer components, but AC is less efficient for powering solenoids, causing heavier wiring and slower performance. For locations that suffer from low AC wall outlet voltage, additional taps may be provided on the AC transformer in electromechanical games to permit raising the game's DC voltage levels, thus strengthening the solenoids. Microprocessor games have electronic power supplies that automatically compensate for inaccurate AC supply voltages.
Historically, pinball machines have employed a central fixed I/O board connected to the primary CPU controlled by a custom microcontroller platform running an in-house operating system. For a variety of reasons that include thermal flow, reliability, vibration reduction and serviceability, I/O electronics have been located in the upper backbox of the game, requiring significant custom wiring harnesses to connect the central I/O board to the playfield devices.
A typical pinball machine I/O mix includes 16 to 24 outputs for driving solenoids, motors, electromagnets and other mechanical devices in the game. These devices can draw up to 500 W momentarily and operate at voltages up to 50 Vdc. There is also individually controlled lighting that consists of 64 to 96 individually addressable lights. Recently developed games have switched from incandescent bulbs to LEDs. And there is general illumination lighting that comprises two or more higher-power light strings connected and controlled in parallel for providing broad illumination to the playfield and backbox artwork. Additionally, 12 to 24 high-impulse lighting outputs, traditionally incandescent but now LED, provide flash effects within the game. Traditionally, these were often controlled by solenoid-level drivers.
A game typically includes 64 to 96 TTL-level inputs from a variety of sensors such as mechanical leaf switches, optical sensors and electromagnetic sensors. Occasionally extra signal conditioning is necessary to adapt custom sensors, such as eddy sensors, to the system TTL inputs.
Recently, some pinball manufacturers have replaced some of the discrete control wiring with standard communication buses. In one case, the pinball control system might include a custom embedded network node bus, a custom embedded Linux-based software stack, and a 48-V embedded power distribution system.
Computer pinball simulation
Simulating a pinball machine has also been a popular theme of video games, most famously when Bill Budge wrote Pinball Construction Set for the Apple II in 1983. While there had been earlier pinball video games, such as Video Pinball for the Atari 2600, Pinball Construction Set was the first program that allowed the user to create his own simulated pinball machine and then play it. Another early pinball video game is David's Midnight Magic.
Most early simulations were top-down 2D. As processor and graphics capabilities have improved, more accurate ball physics and 3D pinball simulations have become possible. Tilting has also been simulated, which can be activated using one or more keys (sometimes the space bar) for "moving" the machine. Flipper button computer peripherals were also released, allowing pinball fans to add an accurate feel to their game play instead of using the keyboard or mouse. Modern pinball video games are often based around established franchises such as Metroid Prime Pinball, Super Mario Ball and Sonic the Hedgehog Spinball.
Popular pinball games of the 1990s include Pinball Dreams, Pro Pinball and 3D Pinball: Space Cadet that was included in Windows Me and Windows XP. More recent examples include Pinball FX and Pinball FX 2.
There have been pinball programs released for all major home video game and computer systems, tablet computers and smart phones. Pinball video game engines and editors for creation and recreation of pinball machines include for instance Visual Pinball, Future Pinball and Unit3D Pinball.
A BBC News article described virtual pinball games e.g. Zen Pinball and The Pinball Arcade as a way to preserve pinball culture and bring it to new audiences. Another example of preserving historic pinball machines is Zaccaria Pinball that consists of digital recreations of classic Zaccaria pinball machines.
Custom pinball machines
Some hobbyists and small companies modify existing pinball machines or create their own custom pinball machines. Some want for example a game with a specific subject or theme that cannot be bought in this form or was never built at all. Some custom games are built by using the programmable P-ROC controller board. Modifications include the use of ColorDMD that is used to replace the standard mono color dot-matrix displays or the addition of features, e.g. figures or other toys.
Data East was one of few regular pinball company that manufactured custom pinball games (e.g. for Aaron Spelling, the movie Richie Rich, or Michael Jordan), though these were basically mods of existing or soon to be released pinball machines (e.g. Lethal Weapon 3).
In popular culture
Pinball games have frequently been featured in popular culture, often as a symbol of rebellion or toughness. Perhaps the most famous instance is the rock opera album Tommy (1969) by The Who, which centers on the title character, a "deaf, dumb, and blind kid", who becomes a "Pinball Wizard" and who later uses pinball as a symbol and tool for his messianic mission. (The album was subsequently made into a movie and stage musical.) Wizard has since moved into popular usage as a term for an expert pinball player. Things came full circle in 1975 when Bally created the Wizard! pinball game featuring Ann-Margret and The Who's Roger Daltrey on the backglass. In the movie version, Tommy plays a Gottlieb Kings and Queens machine, while The Champ plays a Gottlieb Buckaroo machine. In 1976, Bally released Capt.Fantastic, which had an image of Elton John on the backglass, playing pinball in a similar costume as used in the movie Tommy. Tilt is a 1979 drama film starring Brooke Shields as the protagonist, Tilt, a young pinball wizard. Data East produced The Who's Tommy Pinball Wizard in 1994, based on the rock musical The Who's Tommy. This game is notable in its use of The Who's iconic songs, including "Pinball Wizard", sung by original Broadway cast members.
In the late 1970s the children's television series Sesame Street began airing a series of short animated segments, called the "Pinball Number Count". Each segment was different, and involved the ball rolling in different themed areas of a pinball machine depending on which number (from 1-12) was being featured. The animations were directed by Jeff Hale and featured music by Walt Kraemer and vocal work by the Pointer Sisters.
In 1975–76 there was a brief TV game show based on pinball called The Magnificent Marble Machine.
- List of pinball machines
- Glossary of pinball terms
- List of pinball manufacturers
- Pinball Hall of Fame – Pinball arcades located in Las Vegas, Nevada.
- Special When Lit (film) – feature documentary about pinball
- Ed Krynski, game designer and innovator
- John W. Baumgartner, Los Angeles City Council member, 1933–35, opposed pinball machines
- Pacific Pinball Museum – Pinball museum located in Alameda, CA.
- "Internet Pinball Machine Database: M. Redgrave Bagatelle Company '1871 Redgrave Parlor Bagatelle' Images". Ipdb.org. Retrieved 2012-10-27.
- "Ballyhoo". Scholzroland.de. April 2, 1932. Retrieved 2012-10-27.
- US 2073132
- 'Balls-A-Poppin'(1956) was the first flipper machine to feature multi-ball play. An earlier flipperless electromechanical pinball machine that also featured multi-ball play was Dudley-Clark Co.'s 1934 'Live Power'.
- "The History of Pinball Machines". Bmigaming.com. Retrieved 2012-10-27.
- "Top 8 Most Innovative Pinball Machines of All Time". Popular Mechanics. Retrieved April 6, 2015.
- "Pat Lawlor Design". Pat Lawlor Design. December 29, 2009. Retrieved 2012-10-27.
- "Stern Pinball". Stern Pinball. Retrieved 2012-10-27.
- "Pinball News article with Steve Irwin update". Pinballnews.com. September 19, 2006. Retrieved 2012-10-27.
- "Pinball News article on The Pinball Factory's rereleases". Pinballnews.com. Retrieved 2012-10-27.
- "Pinball News article on Big Bang Bar". Pinballnews.com. Retrieved 2012-10-27.
- "Pinball News article on Big Bang Bar update". Pinballnews.com. Retrieved 2012-10-27.
- Bradford, Harry (June 26, 2013). "Jersey Jack Pinball CEO Explains How He's Making The Beloved Arcade Game Cool Again (VIDEO)". Huffingtonpost.com. Retrieved 2013-11-26.
- "Top Ten Things You Should Know About Wizard of Oz Pinball | Ministry of Pinball" (in Dutch). Site.ministryofpinball.nl. Retrieved 2013-11-26.
- Plante, Chris (2013-02-28). "No Place like Jersey: Inside the factory of the wizard of pinball". Polygon. Retrieved 2013-11-26.
- "Marvin Guide to Williams Woodrail Pinballs 1940s/1950s". Marvin3m.com. Retrieved 2012-10-27.
- "11 Things You Didn't Know About Pinball History". Toys. Popular Mechanics. Retrieved September 1, 2011.
- "NYPD Held Prohibition-Style Raids on Pinball". 11 Things You Didn't Know About Pinball History. Popular Mechanics. Retrieved September 1, 2011.
- Seth Porges (September 2, 2005). "End Game" (PDF). Chicago Reader. Retrieved September 30, 2011.
- Cossack v. City of Los Angeles, 11 Cal. 3d 726 (1974).
- "End Game". Chicago Reader. Retrieved April 6, 2015.
- Luke Plunkett. "Pinball Was Once Illegal". Kotaku. Gawker Media. Retrieved April 6, 2015.
- Humpty Dumpty data on the Internet Pinball Database. Retrieved d.d. October 22, 2009.
- "Pinball Glossary". Ipdb.org. Retrieved 2012-10-27.
- "Pinball Cows and Easter Eggs page". Hem.bredband.net. October 25, 1999. Retrieved 2012-10-27.
- Bucher, Matthias (March 2004). "DOHO: Solving A Pinball Mystery". PinGame Journal (103): 6–7.
- Sullivan, Dwight (March 2004). "Hidden Brick Game in ST:TNG". PinGame Journal (103): 8–10.
- Shalhoub, Michael. The Pinball Compendium: 1982 to Present. Schiffer Publishing, Limited. p. 132. ISBN 9780764341076.
- Rossignoli, Marco. The Complete Pinball Book: Collecting the Game and Its History. Schiffer Publishing, Limited. p. 225. ISBN 9780764337857.
- Beresford, Andy. "What are Dot Matrix Display (DMD) Pinball Machines?". Retrieved 21 May 2014.
- "The History Of Pinball Machines". Home Leisure Direct Website. Retrieved 21 May 2014.
- "Internet Pinball Machine Database: Mr. Game 'Dakar'". ipdb.org. Retrieved August 9, 2015.
- "Pinball and car news, tech and resources - Performance Pinball". performancepinball.com. Retrieved August 9, 2015.
- "Article about the Jersey City State College pinball club" (PDF). Retrieved 2012-10-27.
- "International Flipper Pinball Association". Ifpapinball.com. June 10, 2012. Retrieved 2012-10-27.
- "PAPA 15: Final Results". Papa. Retrieved 2013-04-24.
- "Advanced networks make pinball games pop!". Design World Magazine. Retrieved 2015-05-06.
- Rubens, Paul (2014-02-03). "BBC News - Virtual games bring pinball to new audiences". Bbc.co.uk. Retrieved 2014-02-26.
- "Pacific Northwest Pinball - Custom Pinball Projects". Retrieved April 6, 2015.
- "The custom pinball machines of Chicago’s Pinball Expo 2013". Ars Technica. Retrieved April 6, 2015.
- "Pinball and car news, tech and resources - Performance Pinball". Retrieved April 6, 2015.
- "Scared Stiff Pinball Dancing Boogiemen Kit". Retrieved April 6, 2015.
- "Fan Creation: Ghostbusters Pinball Machine". Retrieved April 6, 2015.
- Pinball News - The Matrix at the Dutch Pinball Open 2012. YouTube. October 9, 2012. Retrieved April 6, 2015.
- "Bill Paxton Pinball: The Official Site". Retrieved April 20, 2015.
- "Internet Pinball Machine Database: Bally 'Wizard!'". Ipdb.org. Retrieved 2013-11-26.
- "Internet Pinball Machine Database: Gottlieb 'Kings & Queens'". Ipdb.org. Retrieved 2012-10-27.
- "Internet Pinball Machine Database: Gottlieb 'Buckaroo'". Ipdb.org. Retrieved 2012-10-27.
|Wikimedia Commons has media related to Pinball games.|
- Internet Pinball Database World's largest online searchable database of pinball machines
- Pinball at DMOZ