Blackthorn 3D is a game engine written in Common Lisp. Check out the wiki for more information.

A demo game, the Linux Kinetic Combat Action Simulator, is included with the source for Blackthorn 3D.

Initial development for this project was sponsored by UCSD's CSE 125 course during spring 2011.

Blackthorn 3D does not supersede the old Blackthorn 2D game engine. If you want 3D, use Blackthorn 3D; if you want 2D, use Blackthorn 2D. The APIs do not overlap. At this time there is no plan to integrate them.