Sonic: Extinction is a game by vampire93.
While fighting Eggman, Sonic shatters the Galaxy Jewel and begins the end of the world.
Gameplay is pretty fast paced. There are two modes, Hero and Dark.
In Hero Mode, you play Sonic and his pals, racing to save the world by collecting the Galaxy Shards.
In Dark Mode, you play the baddies and are planning on jacking Eggman's rocket to get off of Mobius before it is too late.
Mephiles the Dark
Fang the Sniper
Lucifer the Hedgehog
PLEASE ADD YOUR OWN! I WILL ADD THEM TO THE UNLOCKABLES LIST WITH REQUIREMENTS MYSELF!
Can be played in both modes
Jet- Clear 'Babylon' 5 times with Sonic
Shadow- Clear 'Space Ark Ruins' 10 times with Sonic
Chaos- Clear Hero Mode 3 times with Sonic and Dark Mode 3 times with Mephiles
Hero Mode Unlockables
Hero Shadow (Shadow with a Blue Aura)- Clear Hero Mode 5 times with shadow
Austin & and Aaron the Twin Cats- Clear Hero Mode with Espio to unlock one, and use him to clear Hero Mode to unlock the other.
Shima- Clear Hero Mode with Shadow and Sonic, and beat the living crap out of her on the level 'Space Ark Ruins' with Amy .
Will- Clear Hero Mode with Blaze.
Blade- Clear Hero Mode with Sonic and Shima.
Dark Mode Unlockables
Rocket Metal- Clear 'Cosmic Cemetary' and 'Egg Citadel' with Metal Sonic
Neo Metal Sonic- Clear 'Scrapheap Garden' 3 times with Metal Sonic
Dark Shadow (Shadow with a Crimson Aura)- Clear Dark Mode with Shadow
Xilax the Hedgehog- Clear Hero Mode with Shima and Shadow
Aero the Sorcerer- Clear Hero Mode with Blade
Green Hill Zone
Space Ark Ruins