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North American Dreamcast cover art
Sonic Team USA (international)
NOW Production (DX staff)
Sega Studios Shanghai (360/PS3)
|Series||Sonic the Hedgehog|
GameCube Game Disc
Sonic Adventure (ソニックアドベンチャー Sonikku Adobenchā?) is a platform video game developed by Sonic Team and published by Sega for the Dreamcast as the first video game to be released for the system. It was originally released for the Dreamcast in 1998, with enhanced ports of the game being released in 2003 for the Nintendo GameCube and Microsoft Windows. It has since been re-released as a downloadable game for Xbox 360 via Xbox Live Arcade, and PlayStation 3 via PlayStation Network in 2010.
Taking place on a fictional island connected to a city, the game follows the adventures of the protagonist Sonic the Hedgehog. An ancient entity named Chaos is released by series villain Doctor Eggman and plots to steal the seven Chaos Emeralds for the entity. Sonic is joined by his best friend Miles "Tails" Prower, Amy Rose, who views Sonic as her love interest, Knuckles the Echidna, who plans to reassemble the Master Emerald, Big the Cat, a cat who attempts to rescue his frog friend, and E-102 Gamma, one of Eggman's robots.
Sonic Adventure received generally positive reviews from critics, who praised the game's graphics, gameplay, and soundtrack. The game would later go on to become the best-selling Dreamcast game. A sequel, titled Sonic Adventure 2, was released in 2001 for the Dreamcast.
- 1 Gameplay
- 2 Plot
- 3 Development
- 4 Alternate versions and releases
- 5 Reception
- 6 Promotion and tie-ins
- 7 Legacy
- 8 Notes
- 9 References
- 10 External links
Sonic Adventure is a platform game in which the player controls six different characters: Sonic the Hedgehog, Miles "Tails" Prower, Knuckles the Echidna, Amy Rose, Big the Cat, and E-102 Gamma. They must stop Doctor Eggman from stealing the seven Chaos Emeralds and feeding them to Chaos, a monster known as "the God of Destruction". The first in the Sonic the Hedgehog series to feature free-roaming 3D gameplay, Sonic Adventure features two game modes: Adventure and Trial. There are different goals for each character in the game: Sonic involves high speed gameplay, while Tails must reach the end of the level before Sonic does and Knuckles searches the area for shards of the Master Emerald. Each of the three characters retain many of their trademark moves from previous Sonic games, such as Tails being able to fly for short periods of time, and Knuckles being able to glide through the air, though they can use updated techniques as well. The rest of the playable cast is rounded out by Amy, who must use her hammer to escape from Eggman's E-100 Zero robot chasing after her, Gamma, who must use its laser beam to shoot through levels to reach a target, and Big, who fishes in efforts to find his friend, Froggy.
The "Adventure Mode" is a one-player game which consists of two areas, the "Adventure Field" and an "Action Stage". The Adventure Field contains several "Events" that are encountered in the course of the story, while the Action Stages have each character fulfilling a goal to clear the stage. Players may also find hidden Chao Gardens, a protective environment inhabited by Chao, a sort of virtual pet. The player can hatch, raise and interact with a Chao. Chao can be taken with the player by downloading the minigame Chao Adventure to their VMU, or in the GameCube version, a Game Boy Advance with Sonic Advance or various other Game Boy Advance Sonic games. The player can also raise their stats by giving them small animals that they found by defeating the robots, which improves their performance in Chao Races. There are also eggs hidden throughout the Adventure Fields which can produce special types of Chao.
By playing through Action Stages and Subgames, searching through the Adventure Fields or winning Chao Races, players can earn Emblems. In the case of Action Stages, each one has three Emblems, which can be earned by replaying the stages and fulfilling certain objectives, such as beating the level within a time limit. In Sonic Adventure DX, these can unlock hidden extras such as Game Gear games.
The titular protagonist of the game is Sonic the Hedgehog, a hedgehog with the ability to run at supersonic speeds who has returned home after a long journey. His longtime friend is Miles "Tails" Prower, a fox with two tails. Knuckles the Echidna is an echidna with the ability to glide; he is the guardian of the Master Emerald. Amy Rose is a pink hedgehog and views Sonic as her love interest. E-102 Gamma is a gunner robot belonging to the E-100 Series who must pass a test for his superior. Big the Cat is a giant cat interested in fishing and is usually accompanied by his friend, Froggy. The characters are aided by Tikal the Echidna, a mysterious female echidna who appears whenever Sonic, Tails, Knuckles, Amy, E-102 Gamma and Big are sent back in time, and also gives out hints to the player.
The main antagonist is Doctor Eggman, an evil scientist who is planning to use the Chaos Emeralds to destroy Earth. Aiding Eggman is Chaos, a liquified life-form. Chaos was previously sealed by Tikal after her father Pachacamac attempted to steal the Chaos Emeralds from the shrine, but has been freed due to Eggman's actions. Also aiding Eggman is E-100 Alpha (better known as Zero), the first E-series robot constructed as a prototype dispatched to find Amy's friend Birdie. Other characters include the E-Series, who are sent away after Gamma locates the Chaos Emerald. All of them have letters of the Greek alphabet as part of their name. E-101 Beta is a black robot with two gun arms who is later upgraded; E-103 Delta is a blue robot; E-104 Epsilon is an orange robot; and E-105 Zeta is a purple robot who is later turned into a cylinder-like form with several turrets made up of a few Dreamcast machines.
Sonic Adventure 's story begins on Angel Island, an island floating above Earth. Three thousand years prior, the Knuckles Tribe's ruler Pachacamac plans for world domination. His daughter Tikal enters a shrine, discovering the Chaos Emeralds and the Master Emerald, a group of mysterious emeralds with unlimited power. She befriends a peaceful entity known as Chaos, the guardian of the emeralds, as well as the Chao. Despite warnings from Tikal, Pachacamac and the tribe attack the shrine, attempting to use the emeralds for their own gain. However, Chaos transforms into Perfect Chaos and destroys them all. Following Chaos' attack, Tikal seals the entity and herself inside the Master Emerald.
In the present, Knuckles the Echidna guards the Master Emerald on the floating Angel Island when the evil scientist Doctor Eggman shatters the Master Emerald and sets Chaos free. As a result, Angel Island plunges into the sea, causing the Master Emerald's shards and the seven Chaos Emeralds to be scattered. Resolving to search for the shards of the Master Emerald, Knuckles sets off. In the city of Station Square, Sonic the Hedgehog battles Chaos after witnessing an attack by the police. Miles "Tails" Prower tests his Chaos Emerald-powered airplane, only to crash on the beach of Emerald Coast. After Sonic rescues Tails, they go to his workshop in the Mystic Ruins, where they are confronted by Eggman. The mad scientist uses Tails' Emerald to transform Chaos and he reveals his ultimate plan: with the power harnessed from the Emeralds, Chaos will eventually become invincible and destroy Station Square and Eggman will build Robotnikland over the city's ruins. Sonic and Tails resolve to search for the emeralds to prevent Eggman from getting them first, but eventually lose the ones they find to Eggman and Chaos. Eggman escapes in his airship, the Egg Carrier, and shoots down Sonic and Tails' pursuing plane.
Eggman activates E-102 Gamma and fights E-101 Beta during his training. He orders the rest of the E-Series robots to search for Froggy, a frog who has eaten Chaos's tail as well as a Chaos Emerald. Gamma finds Froggy but is chased back to the ship by Froggy's owner Big the Cat. After his crash, Tails finds another emerald and uses it to prepare the Tornado II plane to find Sonic while Sonic lands in Station Square once again. While lamenting her time with Sonic, Amy Rose discovers a Flicky bird in possession of a Chaos Emerald and names him Birdie. However, Eggman, having discovered Birdie's location, dispatches his robot Zero to chase the Flicky down. After Sonic turns down an offer to protect Birdie, Zero captures Amy and Birdie and detains them both on the Egg Carrier, with Sonic and Tails using the Tornado II to follow them on board. Knuckles also boards the aircraft after collecting pieces of the Master Emerald and seeing an image of the Egg Carrier in the emerald.
On board the Egg Carrier, Eggman calls out the E-Series robots for their failure and removes them before stationing Gamma in Amy's cell. However, Gamma witnesses Beta being rebuilt and Amy convinces Gamma that he should not work for Eggman, as he is an enemy. In a confusion of newly discovered emotions, Gamma releases Amy and Birdie. While being chased by Zero, Amy goes to the ship's deck. She meets up with Sonic and Tails, but Eggman appears and steals Birdie's emerald, dispatching Gamma to attack Sonic. Sonic damages Gamma, but Amy intervenes and asks Sonic to spares him. Gamma, understanding that Eggman is an enemy, decides to follow the others. The ship loses altitude and Tails, Amy, and Gamma flee, while Sonic restores the ship to its original form. Sonic is confronted by Chaos, now with six Chaos Emeralds and his tail restored, and defeats it once more before pursuing Eggman. Meanwhile, Big retrieves Froggy from inside Chaos before finding the Tornado II, and Knuckles steals back the six Chaos Emeralds; they both flee from the ship as it crashes.
Upon erasing his master registration, Gamma resolves to track down his brother robots. After freeing the animals inside the robots, he goes to the Egg Carrier and confronts Beta, in his rebuilt form. Gamma defeats him, but the fight also causes Gamma to be destroyed, with Birdie's parents being released from within the two. Returning to the Egg Carrier, Amy reunites Birdie with its family, but she is confronted by Zero after he knocks down the Flicky. Amy defeats the robot and sees Birdie and his family off, vowing to do her best. Elsewhere, Tails chases Eggman and stops him from detonating a missile in the middle of Station Square. Eggman resorts to using the Egg Walker to try and level the city, but is again defeated by Tails. Later, Sonic confronts the mad scientist in his Egg Viper and destroys it.
A day following Eggman's defeats, Knuckles restores the shards of the Master Emerald, but Angel Island collapses into the sea once again when Chaos attacks him and Eggman. Chaos absorbs the 6 Chaos Emeralds and locates the seventh aboard the Tornado II, which crashed after Big used it to escape the Egg Carrier. With all the Chaos Emeralds, Chaos transforms into Perfect Chaos, draining the Chaos Emeralds of their negative energy, and destroys Station Square in a massive flood. Tikal appears, having taken each main character into the past numerous times beforehand, demanding that Chaos must be sealed back in the Master Emerald. Sonic objects, saying that Chaos's heart would still be filled with anger and sadness if he were to be sealed inside the Master Emerald. Sonic's friends cheer him on, and Sonic uses the Chaos Emeralds' still-present positive energy to become Super Sonic and face off against Perfect Chaos. Following his defeat, Chaos discovers that the Chao thrive in Station Square, quelling his anger. United with Tikal, Chaos disappears. The game ends with Sonic chasing after a fleeing Eggman.
Development of Sonic Adventure began around April 1997 with a development team of 30 members. After developing several titles for the Sega Genesis, producer Yuji Naka worked mainly on the game Nights into Dreams... for the Sega Saturn. Sonic Team started to work on an original 3D Sonic title for the Saturn, but development was ultimately shifted to the Dreamcast; according to Naka, remnants of the project can be seen in the compilation Sonic Jam. The development team focused on graphics and high resolution for this game, with Naka reflecting that "[w]e have pushed the Dreamcast as far as we can at present".
Director Takashi Iizuka, having developed Nights into Dreams..., proposed to Naka that they should develop a role-playing video game-style Sonic game. The development team wanted to make a realistic world in the game; however, they never saw environments like ruins or jungles. As a result, the core members of the Sonic Team went to Central America and South America. The team visited Cancun, Guatemala and Peru, and used pictures taken from their journey as "textures in the games." For Tails' sandboarding, the development team used a group of people boarding on sand dunes in Ica, Peru as a reference.
Naka aimed to create levels that would take the player at least five minutes to complete, yet retain similar gameplay to the Mega Drive titles. Following the creation of the basic level maps, Naka wondered "why don't we use this map for other characters?" This led to the introduction of Big and E-102. The development team conducted surveys of fans to ensure that the final product, especially the characters, would please them. The character of Sonic was redesigned for the game by Sonic Team artist Yuji Uekawa, with longer legs and spines that Iizuka subsequently noted were more suitable for 3D than Sonic's original and more compact design, which was meant to be seen from the side. Certain levels, such as "Lost World," were rebuilt dozens of times. Sega made it a top priority to keep the game a secret until shortly before its release. Despite these efforts, screenshots were leaked onto the Internet in mid-1998. Naka presented the game to Edge in mid-August, and official announcement fell on August 22 in Japan. The soundtrack was composed by Jun Senoue and Fumie Kumatani and it contains vocal performances from Tony Harnell, Karen Brake, Marlon Saunders, Dred Foxx, Ted Poley, Nikki Gregoroff and Johnny Gioeli, the latter of whom would later join Senoue to form the band Crush 40. The development team preferred the use of "hot, funky, and rock 'n' roll" music over the traditional techno-based music present in earlier Sonic games. The sound effects were created by Takashi Endo, Tatsuyuki Maeda, Yutaka Minobe and Masaru Setsumaru. The game was first unveiled at the Tokyo Game Show in Tokyo, Japan in October 1998 to a positive response.
In February 1999, Sega's vice president Tadahiko Hirose announced that Sonic Adventure would be released along with Virtua Fighter 3tb and Sega Rally 2 as launch titles for the Dreamcast's international release. In June 1999, Sega announced that Sonic Adventure would be one of the five titles in the Dreamcast's "Masterpiece Collection". The North American version of the game includes Japanese and English-language audio tracks, as well as Japanese, English, Spanish, French and German subtitles. Online gameplay and downloadable content were also added for the localization.
Alternate versions and releases
Sonic Adventure International
The international version of Sonic Adventure was re-released in Japan on October 14, 1999 under the title Sonic Adventure International (ソニックアドベンチャー・インターナショナル Sonikku Adobenchā Intānashonaru?).
GameCube and Windows ports
In 2003, an enhanced port was released for the GameCube and Windows titled Sonic Adventure DX: Director's Cut (ソニックアドベンチャー デラックス Sonikku Adobenchā Derakkusu?). Sonic Adventure DX includes a Mission Mode, which included 60 missions to complete throughout the Adventure Fields and Action Stages. It also contains an unlockable compilation that features twelve Game Gear games featuring Sonic and friends. They are Sonic Drift, Sonic Chaos, Sonic Labyrinth, Sonic the Hedgehog: Triple Trouble, Sonic Drift 2, Tails' Skypatrol, Sonic Blast, Tails Adventure, and the 8-bit versions of Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog Spinball, and Dr. Robotnik's Mean Bean Machine. Also, if all Emblems are collected, then the player can play as Metal Sonic. Reviews were generally less positive than those of its Dreamcast predecessor.
On June 10, 2010, Sega officially announced that Sonic Adventure would be released on both the Xbox Live Arcade and the PlayStation Network in Fall 2010. The Xbox Live Arcade version was released on September 15, 2010, while the PlayStation Network version was released on September 20, 2010. The initial release is based on the PC version of Sonic Adventure DX despite the game simply being called "Sonic Adventure". The DLC package, simply titled "Sonic Adventure DX Upgrade", has launched alongside the game on XBLA, and PSN, which upgrades the game to include all of the features from the GameCube and PC versions with the exception of the Game Gear games and Dreamcast DLC. This version also includes Metal Sonic as an unlockable character.
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Sonic Adventure received generally favorable reviews from critics. The current GameRankings average ranking is 86.51%. It became one of the few Sega All Stars games. The Japanese video game magazine Famitsu gave the game a score of 38/40. Although criticized for its camera system, framerate issues, and fishing stages with Big, the game was still highly praised for retaining the fast and enjoyable gameplay that Sonic was known for in 2D as well as the game's graphics, multiple character storylines, and soundtrack. Brandon Justice of IGN rated the game an 8.6/10, criticizing various glitches and voice acting while praising the game's visuals and gameplay. On the other hand, GamePro gave it a 5/5 saying, "Sonic is fun, fast, and a great reason to purchase a Dreamcast". As of August 2006, Sonic Adventure has sold over 2.5 million units worldwide, making it the best-selling Dreamcast game. This includes one million sold in the United States.
At the time of its release, Adventure was acclaimed by the Arcade magazine as a "quantum leap forward" in aesthetics and visual detail in video games, estimated by Hyper to exceed that which was possible on high-end PCs. Computer and Video Games stated shortly after release that "Sonic Adventure is one of the best games ever made" and marveled that "many things you thought were impossible to see and experience in computer games are now here." Edge 's preview stated that graphical features like an "amazingly detailed cityscape" showed off the Dreamcast's potential, comparing it to Super Mario 64 's role for the Nintendo 64, and exclaimed that "as a showcase of what the machine can do, Sonic Adventure is perfect." Speculation arose that the game could save the Dreamcast, which had not sold well so far by the end of 1998, or even re-establish Sega as the dominant console manufacturer after the relatively unsuccessful Saturn.
PlayStation Network and Xbox Live Arcade versions
Reviews for the PlayStation Network and Xbox Live Arcade versions of Sonic Adventure were mixed. IGN UK's Arthur Gies gave the Xbox 360 version a score of 3.5/10 and calling it "so fundamentally flawed that it borders on unplayable--the sections that move the fastest, that work best, require the least input from the player." 1UP.com criticized both the game's dated mechanics and the perceived lack of effort put into the port, which "feels like it wasn't even tuned for the Xbox 360 controller." By contrast, Gamer 2.0 claimed that the controls were "slightly more responsive than those of the Dreamcast original," and PlayStation LifeStyle scored it 8/10, complimenting the "frantic, fun gameplay" and "tons of replayability", concluding that "If you manage to overlook the glitches and dinky camera, you'll easily find a gem (or emerald) in this Dreamcast classic."
Promotion and tie-ins
Prior to the official launch of the Dreamcast in the US, Sega of America formed an exclusive deal with Hollywood Video to allow customers to rent the Dreamcast console along with Sonic Adventure. This promotion began on July 15, 1999 and took place at 1,055 Hollywood Video stores across the country. This non-retail version of the game that was included, titled Sonic Adventure: Limited Edition, featured an initial English of the game's text and voice overs, as well as improvements to Japanese version's controls and camera.
Sonic Adventure received a comic book adaptation courtesy of Archie Comics' Sonic the Hedgehog on-going series. The story arc took place in issues #79-84 and Sonic Super Special #13, originally published from November 1999 to May 2000. This adaptation is notable for its permanent integration of characters and story-lines from the video game into the pre-existing continuity of the comic series, providing explanations for the altered character design for Amy Rose and the history of Station Square hidden beneath Sonic's planet, Mobius. Selected portions of these issues (with the exception of issue #79) were reprinted in Archie's Sonic Super Special Magazine #2 (February 2012).
Franco-American's Sonic the Hedgehog pasta featured Sonic Adventure inspired labeling for a limited time and offered consumers a chance to obtain a free Archie Sonic comic book.
In 2000, Toy Island produced multiple lines of Sonic Adventure toys, featuring 5" action figures, 10" talking figures, and 3" bendy figures. Several of these figures were later reissued as part of their Sonic X lines in 2004.
Following Sonic Adventure, Sonic Team developed Sonic Adventure 2, the final Sonic game for the Dreamcast. Adventure also introduced two characters that would appear in later games and other media—Big and Gamma—as well as the ubiquitous Chao creatures.
Writers at GamesRadar have stated that, as Sonic Adventure was one of the first 128-bit console games, "the gaming world was changed forever" despite presence of some glitches. Travis Fahs of IGN asserted in 2010 that it is still remembered as the most impressive Sonic game from after the Genesis era and that, despite Sega's efforts, no post-Dreamcast Sonic game has achieved similar success. Taylor Cocke of Joystiq has stated that the original Sonic the Hedgehog and Adventure both succeeded and innovated in gaming—among 2D and 3D games, respectively—by feeling "good to play" and making effective use of linear level design. In 2009, GamePro listed the game as the seventh best platformer of all time, asserting that while it had not aged well in certain respects, its core gameplay "is still some of the best" in the entire series. According to game journalists Rusel DeMaria and Johnny L. Wilson, Sonic Adventure "wasn't a strong enough title" and "failed to catch on with players in nearly the way that Mario 64 had done," "though it had many fascinating features, including the use of the Tamagotchi-like memory card to incubate eggs for little pet creatures" and "some good action segments." In a 2006 retrospective, Retro Gamer's Sean Smith noted that while Adventure "has its share of detractors", it "still looks luscious and plays extremely well." Writing in 1001 Video Games You Must Play Before You Die, Kieth Stuart described Adventure as "Sonic Team's flawed masterpiece", praising its "vast, twisting environments" and noting "From driving bumper karts in Twinkle Park to legging it down the side of a skyscraper in Speed Highway, the game brilliantly captures traditional Sonic elements."
In 2011, Sonic Team developed Sonic Generations, a game that remade aspects of various past games from the franchise. The PlayStation 3, Xbox 360, and PC version contained a remade "Speed Highway" level, and a remade battle with Perfect Chaos. The Nintendo 3DS version contained a remade version of the "Emerald Coast" level.
- "Game Developer Research Institute".
- "Sega Considering Saturn Download Releases".
- Gantayat, Anoop (June 30, 2010). "Coming soon to the Xbox LIVE Marketplace". Archived from the original on December 15, 2010.
- Search: (2010-09-15). "Sonic Adventure Release Information for Xbox 360". GameFAQs. Retrieved 2011-08-11.
- Arthur Gies (23 September 2010). "Sonic Adventure Review". IGN. Retrieved 20 April 2013.
- Peter Bartholow (31 December 1998). "Sonic Adventure Review". Gamespot. Retrieved 20 April 2013.
- Sega, p. 7
- Peter Bartholow (December 31, 1998). "Sonic Adventure Review". GameSpot. Retrieved April 20, 2013.
- Arthur Gies (September 23, 2010). "Sonic Adventure Review". IGN. IGN Entertainment. Retrieved April 20, 2013.
- Sega, p. 9
- Sega, p. 15
- Matt Casamassina (June 21, 2003). "Sonic Adventure DX Director's Cut". IGN. IGN Entertainment. Retrieved April 20, 2013.
- Sega, p. 18
- Sega, p. 20
- Sega, p. 22
- Sega, p. 24
- Sega, p. 26
- Sega, p. 28
- Sega, p. 31
- ソニックチャンネル/キャラクター/キャラクターデータ/ガンマ (in Japanese). Sega. Archived from the original on December 20, 2012. Retrieved December 20, 2012.
- Sonic Team (1998). "Sonic Adventure". Dreamcast. Sega. Level/area: Opening sequence 3.
Knuckles the Echidna: (a noise awakens him) What the..? (he sees Chaos) What's going on here?
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Opening sequence 3.
Knuckles the Echidna: Oh, no! It's starting to happen! Without the Master Emerald's power, this whole island will fall into the ocean!
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Chaos.
- Sonic Team (September 9, 1999). "Sonic Adventure". Sega. Level/area: Opening sequence 2.
- Sonic Team (September 9, 1999). "Sonic Adventure". Sega. Level/area: Eggman.
- Sonic Team (September 9, 1999). "Sonic Adventure". Sega. Level/area: Mystic Ruins.
- Sonic Team (September 9, 1999). "Sonic Adventure". Sega. Level/area: Sky Chase Act 1.
- Sonic Team (September 9, 1999). "Sonic Adventure". Sega. Level/area: Opening sequence 6.
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Opening sequence 4.
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Mystic Ruins.
E-102 Gamma: Dr. Robotnik... Enemy... Master registration... Deleted. E-Series... Friends... (touches down on the ground) Must save...
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: E101mkII.
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Ending sequence 6.
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Zero.
Amy Rose: You idiot! How could you do this? (pulls out her Piko Piko Hammer) Now, you're gonna get it!
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Ending sequence 4.
Amy Rose: You did it! Now, you three can live in peace again! (Birdie's family flies off) I'm so happy! I'm going to try my best, too!
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Egg Walker.
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Egg Viper.
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Ending sequence 3.
Knuckles the Echidna: (after restoring the Master Emerald) This should do it! Perfect. All is well now! The Master Emerald and the Island are restored.
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Perfect Chaos.
- Sonic Team (September 9, 1999). "Sonic Adventure". Dreamcast. Sega. Level/area: Ending sequence 7.
- Barnholt, Ray. "Yuji Naka Interview: Ivy the Kiwi and a Little Sega Time Traveling". 1UP.com. Retrieved 2014-03-04.
- Towell, Justin (2012-06-23). "Super-rare 1990 Sonic The Hedgehog prototype is missing". GamesRadar. Retrieved 2014-03-04.
The reason why there wasn't a Sonic game on Saturn was really because we were concentrating on NiGHTS. We were also working on Sonic Adventure--that was originally intended to be out on Saturn, but because Sega as a company was bringing out a new piece of hardware--the Dreamcast--we resorted to switching it over to the Dreamcast, which was the newest hardware at the time. So that's why there wasn't a Sonic game on Saturn. With regards to X-Treme, I'm not really sure on the exact details of why it was cut short, but from looking at how it was going, it wasn't looking very good from my perspective. So I felt relief when I heard it was cancelled.
- "Sega Unveils Sonic Adventure". Edge: pp. 6–7. October 1998.
- The Secrets of Sonic - Director's Commentary with Takashi Iizuka. Tokyo: Sega. June 5, 2003.
- Mott, Tony (2013). 1001 Video Games You Must Play Before You Die. New York, New York: Universe Publishing. p. 370. ISBN 978-0-7893-2090-2.
- Thomason, Steve (January 2007). "Birth of a Hedgehog". Nintendo Power (Future Publishing) 20 (211): 72.
- "Summer Of Sonic 2011 - Takashi Iizuka & Yuji Naka Q&A". YouTube. 2012-03-25. Retrieved 2014-07-10. Event occurs at 18:20.
- Smith, Sean (June 22, 2006). "Company Profile: Sonic Team". Retro Gamer 3 (26): 27.
- Sonic Team (November 27, 1998). "Sonic Adventure". Dreamcast. Sega. Level/area: Credits.
- IGN Staff (October 15, 1998). "TGS: Games Show Renewed Faith in Sega". IGN. News Corporation. Retrieved January 19, 2013.
- Ohbuchi, Yutaka (February 2, 1999). "Sonic, VF3, Rally 2 lead US DC launch". GameStop. CBS Interactive. Retrieved January 19, 2013.
- IGN Staff (June 1, 1999). "Sega's New Challenge Conference '99 Report". IGN. News Corporation. Retrieved January 19, 2013.
- Gantayat, Anoop (August 28, 1999). "Sonic Adventure US Shocker". IGN. News Corporation. Retrieved January 19, 2013.
- Gantayat, Anoop (August 24, 1999). "Sonic Adventure: Internet Gaming!". IGN. News Corporation. Retrieved January 19, 2013.
- "Game Rankings's average review score for Sonic Adventure". Game Rankings. CBS Interactive. Retrieved April 20, 2013.
- "Game Rankings's average review score for Sonic Adventure DX: Director's Cut". Game Rankings. CBS Interactive. Retrieved April 20, 2013.
- Stephany Nunneley (2010-08-31). "Crackdown 2 Toy Box DLC, Sonic Adventure and more dated for XBLM". VG247. Retrieved 2011-08-11.
- Barnholt, Ray (2010-09-14). "Sonic Adventure Review for 360 from". 1UP.com. Retrieved 2011-08-11.
- "Sonic Adventure Reviews". Game Rankings. CBS Interactive. Retrieved April 20, 2013.
- "GEIMIN.NET／週刊ファミ通クロスレビュープラチナ殿堂入りソフト一覧". Geimin.net. Retrieved April 15, 2013.
- Justice, Brandon (September 8, 2009). "Sonic Adventure Review". IGN. Retrieved September 17, 2009.
- Daniel Boutros (2006-08-04). "Sonic Adventure". A Detailed Cross-Examination of Yesterday and Today's Best-Selling Platform Games. Gamasutra. Retrieved 2006-12-08.
- "US Platinum Videogame Chart". December 27, 2007. Retrieved April 20, 2013.
- "Sonic Adventure". Arcade (1): p. 23. December 1998.
- "Sonic Adventure". Hyper: p. 18. March 1999.
- "SONIC: It's been a long time coming, but we've been very". Computer and Video Games (215): p. 60. October 1999.
- "Sega Unveils Sonic Adventure". Edge: p. 6. October 1998.
- "Sonic Adventure". Computer and Video Games (209): p. 20. April 1999.
- "Sonic Adventure". Computer and Video Games (209): p. 12. March 1999.
- Arthur Gies (2010-09-14). "Sonic Adventure Review - Xbox 360 Review at IGN". Uk.xboxlive.ign.com. Retrieved 2011-08-11.
- Dinolfo, Filippo, Review: Sonic Adventure (Xbox 360, PS3), Gamer 2.0, September 27th, 2010.
- Hartnett, Mike (September 23, 2010). "PSN Review – Sonic Adventure". PlayStation LifeStyle.
- IGN staff (June 29, 1999). "Sega Releases Full Details of Rental Program". IGN. Retrieved October 24, 2014.
- Gantayat, Anoop (July 15, 1999). "Sonic Adventure: Limited Edition Quick Look". IGN. Retrieved October 24, 2014.
- IGN staff (July 15, 1999). "A Sit-down with Sonic Adventure: LE". IGN. Retrieved October 24, 2014.
- Cundy, Matt; Houghton, David; Irvine, Nathan; Towell, Justin (June 23, 2012). "Top 7... horrendously buggy games we loved anyway". GamesRadar. Retrieved May 1, 2014.
- Fahs, Travis (September 9, 2010). "IGN Presents the History of Dreamcast". IGN. Retrieved April 19, 2014.
- Cocke, Taylor (June 21, 2012). "Silver Lining: Sonic the Hedgehog and a history of disappointment". Joystiq. Retrieved April 19, 2014.
- Noble, McKinley. "The 20 Best Platformers: 1989 to 2009". GamePro. Archived from the original on May 6, 2009.
- DeMaria, Rusel, and Johnny L. Wilson (2004), High Score: The Illustrated History of Electronic Games, McGraw-Hill/Osborne, p. 312.
- Sonic Team Staff (1999). Sonic Adventure Instruction Manual. Sega. 51000.
Media related to Sonic Adventure at Wikimedia Commons
- Sonic Adventure at Sega's official website (Japanese)
- Sonic Adventure International at Sega's official website (Japanese)
- Sonic Adventure DX at Sega's official website (Japanese)
- Sonic Adventure at Sega Retro