I didn't see anything regarding this, so if I was wrong, please proceed to trash this. Click here. Sonic Blitz is a fan game made by Damizean/Mark of the Sonic hacking community. Basically, Sonic is in a TRUE 3D environment with momentum based physics. You can download this engine and also download other levels/character models and use them. Also you can make your own levels and play them in the game too! Discuss!