Game Groups > Sonic the Hedgehog 4 series
Related Groups
- Animals: Hedgehogs
- April Fools' releases
- Game Engine: Retro Engine
- Game feature: BGM / music player
- Game feature: FMV / cutscene player
- Gameplay feature: Drowning
- SEGA Forever series
- SEGA Vintage Collection series
- Sonic the Hedgehog fangames
- Sonic the Hedgehog universe
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