Tread Marks is a 3D, third-person perspective, multiplayer-focused tank combat and racing computer game developed by Independent video game developer Longbow Digital Arts. The game won the 2000 Independent Games Festival grand prize, later renamed to the Seumas McNally Grand Prize in honor of the game's lead programmer Seumas McNally who died on 21 March 2000, after receiving the award. A notable feature of the game is fully deformable terrain.