Cosmo's Cosmic Adventure

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Cosmo's Cosmic Adventure
Cover art
Developer(s) Apogee Software
Publisher(s) Apogee Software
Producer(s) Scott Miller
Designer(s) Todd Replogle
Allen Blum III
Artist(s) Stephen Hornback
Composer(s) Bobby Prince
Platform(s) DOS
Release March 1992
Genre(s) Platform
Mode(s) Single-player

Cosmo's Cosmic Adventure: Forbidden Planet is a video game programmed by Todd Replogle and published by Apogee Software. It is a two-dimensional side-scrolling platform game. Its working titles were "The Adventures of Zonk"[1] and "Cosmo Kid from Space", but Stephen Hornback ultimately gave it the final name.[2] The game was released in mid March 1992 on the DOS platform.[3]


Typical gameplay shot

Cosmo features 16-color EGA graphics at 320×200 screen resolution. Although the game had superior graphics capabilities in the form of three-layer masked horizontal parallax scrolling, this feature came at the cost of the game's frame rate, moving the graphics in increments of 8 pixels (the size of one game tile) instead of 1 pixel. A file contained with the shareware version of the game urged people not to download it if their computers could not handle it. The game was written with 24,500 lines of code.[4]

Music and sound[edit]

While the game supports AdLib music, it does not support SoundBlaster sound. The sound effects are instead generated by the PC speaker. One can cycle through all the sound effects in the game through the sound test option in the main menu.


The storyline is about a little alien boy named "Cosmo". Cosmo's parents are taking him to Disneyland for his birthday. A comet hits their ship, forcing them to land on an unknown planet (called Zonk in WIP[3]) and repair the ship. Cosmo goes exploring, and when he returns, his parents are missing. Seeing large footprints, Cosmo thinks that his parents have been captured and sets off to rescue them before they are eaten. There are 3 episodes in the game series in which Cosmo must navigate through 10 alien-themed levels.

At the end of the first episode, Cosmo unexpectedly gets swallowed by a large creature. The story continues in the second episode, where Cosmo ends up in the creature's body and has to find a way out. At the end of the second episode, Cosmo finds the city where he thinks his parents might have been taken. In the final episode, Cosmo finds his parents (who were in no danger of being eaten the whole time) and has a great time at Disneyland for his birthday.


The player controls the main character Cosmo, around the levels in order to reach the exit point. Cosmo can walk and jump, and can hang onto most walls with his suction-cup hands. Combining the hanging and jumps allows Cosmo to climb to higher places. There are some interactive objects in the game, including pushable ceiling buttons, teleporters, and springs that make Cosmo jump higher. There are also hovercrafts (floating pads that allow Cosmo to fly) and hint globes (which cause a message to be displayed if Cosmo runs into one; destroying one with a bomb earns 12,800 points). The player has access to bonus levels after each level if enough stars are collected. Duke Nukem is found on Level 7, Episode 2 encased in a block of ice. The player can bomb the ice to release him, in which case he will give Cosmo a cheeseburger. He refuses to help Cosmo as he is on a mission (to save the galaxy), but tells Cosmo to watch out for his next game: Duke Nukem II. Duke's name is displayed as Duke Nukum.

Fighting and health[edit]

Cosmo has a health meter starting with three units. Each time an enemy or hazard damages Cosmo, he loses one unit of health. If he takes further damage after losing all health units, or falls off a chasm, the player restarts the level. Cosmo has unlimited lives. There are power-up modules that restore one health unit each. There are also two hidden cheeseburgers in each episode. Picking one up earns Cosmo an additional empty health unit; thus Cosmo's health meter can have a maximum of five units. There are several enemies found in the levels. They hurt Cosmo by touching him or firing projectiles at him. Cosmo can kill many of them by jumping on them once or multiple times. Bombs can also be collected and used to destroy enemies. Cosmo can carry at most 9 bombs at a time. After Cosmo drops a bomb, it takes a few seconds to explode, and it can hurt Cosmo if he is too close. Bombs can also be used to destroy other objects and hazards in the game. There are also shield cubes, which once collected provide a temporary invincibility shield for Cosmo.


Computer Gaming World stated that Cosmo's Cosmic Adventure was "especially playable and extremely addicting", and that fans of Commander Keen and side-scrolling platform games "will find Cosmo much to their liking ... hours of pleasure without excessive destruction".[5] The game was reviewed in 1993 in Dragon #197 by Sandy Petersen in the first "Eye of the Monitor" column. Petersen gave the game 2 out of 5 stars.[6]


  1. ^ Joe Siegler (November 20, 2000). "New Version of the Apogee / 3DR FAQ Online". 3D Realms. Retrieved December 4, 2017. 
  2. ^ "Retro Interview: Stephen A. Hornback". Imagine Publishing. Retrieved December 2, 2017. 
  3. ^ a b Apogee Software December 1991 Catalog
  4. ^ Todd Replogle & Stephen Hornback (1992). "Cosmo Hint Sheet". Apogee Software. Retrieved December 6, 2017. 
  5. ^ Miller, Chuck (March 1993). "Totally Spaced-Out". Computer Gaming World. No. 104. pp. 110,111. 
  6. ^ Petersen, Sandy (September 1993). "Eye of the Monitor". Dragon. No. 197. pp. 57–62. 

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