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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
Sonic Adventure 2
Super Smash Bros. Brawl
Sonic Dash
Sonic Pinball Party
LEGO Dimensions
Sonic Origins Plus
Sonic the Hedgehog Chaos
Sonic Rivals 2
Sonic Forces: Speed Battle
Sega Genesis Classics
Sonic the Hedgehog 2
Sonic R
Sonic Adventure 2: Battle
Sonic Unleashed
Sonic Frontiers
Sonic the Fighters
Sega Superstars Tennis
Sonic Rush Adventure
Super Smash Bros. Ultimate
Sonic Runners
Sega Superstars
Sonic & Knuckles
Sonic Riders: Zero Gravity
Knuckles Baseball
Sonic Colors
Sonic Lost World
Sonic Mania
Sonic Battle
Sonic the Hedgehog's Gameworld
Tails and the Music Maker
Dr. Robotnik's Mean Bean Machine
Knuckles' Chaotix
Sonic Boom: Shattered Crystal
Sonic Generations
Sonic Riders
Sonic the Hedgehog Pocket Adventure
Sonic Boom: Rise of Lyric
Sega Top Ten
Super Smash Bros. for Wii U
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Sonic Adventure DX: Director's Cut
Sonic Mega Collection
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Sonic & All-Stars Racing Transformed
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Sonic the Hedgehog Extreme
Sonic X