Sonic Adventure 2
is a 2001 platform game developed by Sonic Team USA and published by Sega for the Dreamcast. It features two good-vs-evil stories: Sonic the Hedgehog, Miles "Tails" Prower, and Knuckles the Echidna attempt to save the world, while Shadow the Hedgehog, Doctor Eggman, and Rouge the Bat attempt to conquer it. The stories are divided into three gameplay styles: fast-paced platforming for Sonic and Shadow, third-person shooting for Tails and Eggman, and exploration-based treasure hunting for Knuckles and Rouge. Like previous Sonic the Hedgehog games, the player completes levels while collecting rings and defeating enemies. Outside the main gameplay, they can interact with Chao, a virtual pet, and compete in multiplayer battles.
After the release of Sonic Adventure, Sonic Team was downsized and a portion of the staff moved to San Francisco to establish Sonic Team USA. They worked on Adventure 2 for a year and a half, with Takashi Iizuka directing and Yuji Naka producing. Developed during a tumultuous period in Sega's history, Adventure 2 had a significantly smaller development team than the first game. Sonic Team USA streamlined the design to emphasize faster, more action-oriented gameplay, giving each character roughly equal gameplay time. The levels were influenced by American locations such as San Francisco and Yosemite National Park. The soundtrack—composed by Jun Senoue, Fumie Kumatani, Tomoya Ohtani, and Kenichi Tokoi—spans genres including pop-punk, glam metal, rap and orchestral arrangements, and features several metal singers.
Sonic Adventure 2 was released in June 2001, coinciding with the franchise's tenth anniversary. It was the final Sonic game for a Sega console, released in the months after Sega discontinued the Dreamcast and transitioned to third-party development. Later in 2001, it was ported to the GameCube as Sonic Adventure 2 Battle, the first Sonic game for a Nintendo console. Adventure 2 received positive reviews, with praise for its gameplay variety, visuals, and music but criticism for its camera, voice acting, and plot. Although reviews of Battle were more mixed, it sold 1.7 million copies worldwide, becoming one of the bestselling GameCube games and the bestselling third-party GameCube game. Following Adventure 2, Sonic became a multiplatform franchise, beginning with Sonic Heroes.
Sonic Adventure 2 introduced Sonic to a wider audience with its GameCube port. It originated characters and elements used in later games; Shadow became one of the most popular Sonic characters and featured in the spin-offs Shadow the Hedgehog and Shadow Generations. Adventure 2 remains popular among Sonic fans and was rereleased for the PlayStation 3, Xbox 360, and Windows in 2012. Its first level, City Escape, is considered one of the greatest opening stages in a video game. Adventure 2 has been ranked among the best Sonic games, although it has been characterized as divisive, particularly for its emphasis on multiple characters. Its story has been adapted in media including in the anime series Sonic X and the live-action film Sonic the Hedgehog 3.
Gameplay
Sonic Adventure 2 is a 3D platform game divided into two campaigns: Hero and Dark. In the Hero campaign, players control Sonic, Tails, and Knuckles, who fight to save the world; in the Dark campaign, players control Shadow the Hedgehog, Doctor Eggman and Rouge the Bat, fighting to conquer it. Each campaign cycles through levels of its three characters, telling different sides of the story. Levels have a variety of themes, with some followed by boss fights. The two campaigns' stories occur in parallel; completing both campaigns unlocks a final story with all six characters, culminating in a final boss fight.Sonic and Shadow play fast-paced levels, emphasizing platforming. Their homing attack can lock on to robots created by Eggman and GUN, and they can grind on rails. Tails's and Eggman's levels are slower and oriented towards multidirectional shooting; they are confined to mechs in which they can jump short heights, hover and shoot enemies. Knuckles's and Rouge's levels feature open exploration with treasure hunting; in each level, they must find three shards of the Master Emerald. Their search is guided by radar and puzzle-based clues from harmless robots. Knuckles and Rouge can glide, defeat enemies with punches and kicks, and scale walls, digging into them to find power-ups.
Adventure 2 has the health system found in many other Sonic games. The player collects rings scattered throughout the levels; being hit by an enemy while holding rings causes the player to drop them all, while being hit without rings causes them to lose a life. Tails and Eggman have health bars, which are slowly refilled by collecting rings. Dying with no lives results in a game over screen. The characters can obtain permanent upgrades that grant them new abilities; for example, one upgrade allows Sonic and Shadow to dash along a sequential trail of rings to reach distant platforms, one gives Tails and Eggman hover jets that slows their descent to cross large gaps, while another lets Knuckles and Rouge dig into the ground to uncover treasure and Master Emerald pieces.
Separate from the main campaigns, the player can raise Chao as virtual pets. They have five attributes and a moral continuum from Hero to Dark. From the moment they hatch, their stats can be increased with Chaos Drives or small animals, found in the main stages, which empower them to compete in karate and racing minigames. Their alignment gradually changes based on their affection for the characters; for example, a Chao which likes Tails will gradually become more heroic. Playing with Chao increases affection, and when a Chao becomes fully Hero or Dark, it assumes that form permanently. Although Chao eventually die, if they receive enough affection during their lives they reincarnate.
Adventure 2 has 180 emblems, earned for a variety of tasks. Each level has five missions; only the first is required to continue the campaign, and other missions include completing a harder version of a level and collecting 100 rings. The player earns emblems by completing missions and other tasks, many related to Chao raising. Collecting all the emblems unlocks a 3D version of the Green Hill Zone stage from the original Sonic the Hedgehog.
The game has several two-player modes. Players may race on foot through new levels, have shoot-'em-up battles in mechs, hunt for Master Emerald shards or race in go-karts. A few characters are playable in these modes, but not in the main game; Tikal and Chaos from the original Sonic Adventure are playable in the treasure-hunting game, as are Amy Rose and Metal Sonic in the foot-racing levels and mechs piloted by Chao and Big the Cat in the shooting levels.
Plot
Doctor Eggman learns of a secret weapon from the diary of his deceased grandfather, Professor Gerald Robotnik, and infiltrates a high-security Guardian Units of Nations facility to revive it with a Chaos Emerald. The weapon—Shadow, a black hedgehog who proclaims himself the "Ultimate Lifeform"—offers to help Eggman conquer the world, telling him to rendezvous at an abandoned space colony, the ARK, with more Chaos Emeralds. Shadow has vowed to fulfill a promise he made to his friend, Eggman's cousin Maria, before she died; the amnesiac Shadow interprets the promise as one of revenge. Shadow steals a Chaos Emerald, and GUN arrests Sonic after mistaking him for Shadow.Knuckles encounters Eggman and Rouge, a government spy, attempting to steal the Master Emerald. He stops them by shattering it and searches for the scattered shards to repair it. Rouge follows Eggman to the ARK, where Shadow shows Eggman the Eclipse Cannon, another weapon created by Gerald. Shadow plans to charge the cannon with the seven Chaos Emeralds and use it to take over the world. Rouge offers her services and gives Shadow and Eggman another Chaos Emerald to gain their trust. Tails and Amy infiltrate GUN's base and rescue Sonic, while Rouge retrieves three emeralds from the base before Eggman destroys it. Eggman makes a global broadcast in which he threatens to destroy the planet if he is not accepted as Earth's ruler in a day. He demonstrates the cannon's power by destroying half of the Moon. Sonic, Tails, and Amy meet up with Knuckles and use a Chaos Emerald to track the others to the ARK.
Knuckles separates from the group and finishes repairing the Master Emerald. On the ARK, Tails gives Sonic a counterfeit Chaos Emerald to destroy the Eclipse Cannon. As Sonic is about to use it, Eggman captures Tails and Amy, forcing Sonic to return and rescue them. Sonic tries to trick Eggman with the fake emerald, but Eggman deduces the plan and jettisons him in an escape pod rigged with explosives. Sonic uses the power of the fake emerald to escape; Eggman sneaks away with the last emerald and arms the Eclipse Cannon. The ARK suddenly starts falling, and a prerecorded message from Gerald is broadcast globally: he programmed the ARK to collide with Earth if the emeralds were used, a retaliation against the government for condemning his research and killing his colleagues, including Maria. Everyone but Shadow works together to access the cannon's core and neutralize the ARK using the Master Emerald.
Amy pleads for Shadow's help, and he remembers that he promised Maria to help mankind, not destroy it. Shadow joins Sonic and Knuckles in the core as they encounter the Biolizard, a colossal lizard and prototype Ultimate Lifeform. Knuckles deactivates the Chaos Emeralds with the Master Emerald, but the Biolizard fuses with the cannon to continue the ARK's collision course. Sonic and Shadow use the emeralds to transform into their super forms, destroy the Biolizard, and put the ARK back into a stable orbit. This depletes Shadow's energy and he plummets to Earth, content in fulfilling his promise to Maria. The people on Earth celebrate as the group returns, and Sonic bids Shadow farewell.