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Sonic Gaiden is a hacked rom of the Japanese version of Sonic the Hedgehog. You can choose to play as either Sonic or Mighty the Armadillo. The differences between Sonic and Mighty are purely cosmetic.
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More Free Sonic Games
Sonic Classic Heroes
Control Sonic, Tails, or Knuckles in this combination effort of Sonic 1 and Sonic 2
Zero is dead (or is he?) and X is being lured by a group of Maverick Hunters. Battle 8 more robot masters in this one.
Sonic the Hedgehog
Play the original Sonic the Hedgehog rom for the Sega Genesis. This is the FULL game!
Sonic Jam 6
Sonic has entered Mario world! Spin and jump per usual but also hurl fireballs once you grab the almighty fireflower!
Sonic 2 Advanced Edit
Featuring Sonic, Tails, Amy, and Knuckles, Sonic must traverse a hack with all new enemies and stages
Sonic Boy 2 Eggmans Trap
Sonic is a sword wielding knight where he must defeat MEKA Dragon. You play as Tails and Sally later on too!
Sonic Streets Of Rage 3
This rom is a hack of Streets of Rage 3 where you can play as Sonic!
Sonic 2 Mecha World
Featuring Green Sonic, this game has been redesigned with new levels to explore with a mecha world feel
Sonic Boy In Monster Land
Sonic as a young lad must overcome the forces of evil with nothing but his trusty sword!
Shadow The Hedgehog
Play Sonic 1 but as Shadow in this fan sprite swap. The palettes of the enemies have also been changed as well.
Sonic and Knuckles Sonic 3
A combination game of Sonic and Knuckles and Sonic the Hedgehog 3 all rolled into one rom!
Sonic Spinball MS
A fun pinball game but Sonic style. Use the controls to keep Sonic spinning and bouncing everywhere for maximum points.
Sonic Hedgehog Improvement
This rom hack translates Sonic for Sega over to the NES while also making all kinds of improvements.
Mean Bean Machine
A falling block puzzle game in the same light as Dr Mario but with a bit more difficulty
Sonic 2 Retro Remix
This rom hack focuses on exploration and completing missions such as acquiring Chaos Emeralds or defeating bosses
Mario In Sonic 1
Have you ever wanted to play Sonic the Hedgehog but as Mario? Well, now is your chance!
Amy Rose In Sonic 2
Ever wanted to play Sonic 2 but as Amy Rose? Well, here is your chance. Tails comes along as usual too.
Sonic 1 Megamix
Play as Sonic, Mighty, Shadow (choose in options) in this awesome mix up rom hack of Sonic the Hedgehog
Sonic Boy 4 Monster World
The 4th installment of Sonic Boy sees Sonic armed with his trusty sword and plopped down in Monster World
Sonic 2 Aluminum Edition
This rom hack only features new graphics and different zone names but is otherwise Sonic 2
Sonic 2 Robotniks Revenge
Play Time Attack or Survival mode in this fun boss rush hack featuring 17 different bosses to fight
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