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There were originally plans to have Knuckles' Chaotix and SegaSonic the Hedgehog included in the game. The only remnants of Knuckles' Chaotix is in the game's art gallery, and SegaSonic the Hedgehog was cut due to problems with emulating the game's original trackball control scheme.
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In the Museum of Sonic Gems Collection, a number of classic Sonic games can be unlocked. These games start at the final boss, and can only be played for a set amount of time.
By using a cheat device to freeze the clock it's actually possible to play the entire game after the final boss is defeated.
By using a cheat device to freeze the clock it's actually possible to play the entire game after the final boss is defeated.
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There are several games that are not present in the US version, but their listings in the games menu can be seen with Action Replay codes. These games include:
• Bonanza Bros
• Streets of Rage 1
• Streets of Rage 2
• Streets of Rage 3
• Wonder Boy III: Monster Lair
• Wonder Boy in Monster World
• Monster World IV
• Sonic Eraser
Bonanza Bros and each Streets of Rage game are unlockable in the Japanese version but none of these games can actually be played on the US version.
• Bonanza Bros
• Streets of Rage 1
• Streets of Rage 2
• Streets of Rage 3
• Wonder Boy III: Monster Lair
• Wonder Boy in Monster World
• Monster World IV
• Sonic Eraser
Bonanza Bros and each Streets of Rage game are unlockable in the Japanese version but none of these games can actually be played on the US version.
Related Games
Knuckles' Chaotix
Sonic the Fighters
Sonic & Knuckles
Sonic the Hedgehog 4: Episode II
Sonic the Hedgehog Extreme
Sonic CD
Sega Genesis Classics
Sonic Advance 3
Mario & Sonic at the Rio 2016 Olympic Games
Mario & Sonic at the London 2012 Olympic Games
Sonic the Hedgehog 2
Sonic's Ultimate Genesis Collection
Sonic Adventure 2
Sonic Origins Plus
Shadow Basketball
Sonic Advance
Super Smash Bros. for Nintendo 3DS
Mario & Sonic at the Olympic Games
Sonic Classic Collection
Sonic and the Secret Rings
Sonic Mania
Amy & Rouge Tennis
Sonic Rush Adventure
Sonic Heroes
Sonic Adventure DX: Director's Cut
Sonic Generations
Sonic the Hedgehog
Cream Flower Catch
Sonic Rivals 2
Sonic the Hedgehog 2
Sonic the Hedgehog Pocket Adventure
Sonic the Hedgehog 3
Dr. Robotnik's Mean Bean Machine
Sonic 3D Blast
Sonic the Hedgehog: Triple Trouble
Sega Heroes
Mario & Sonic at the Rio 2016 Olympic Games
Sonic Lost World
Sonic R
Sonic the Hedgehog
Sonic Rivals
Sonic Jam
Tails and the Music Maker
Sonic Underground
Sonic Riders: Zero Gravity
Sonic Rush
Sonic Chronicles: The Dark Brotherhood
Mario & Sonic at the Olympic Winter Games
Sonic Riders
Sonic Adventure 2: Battle