The Bork3D Game Engine is a C++ game engine developed by Bork 3D LLC for use on mobile device platforms, primarily targeting iPhone and iPad. The engine has a modest user base, and several iOS games have announced their use of it, most notably from Bioroid Studios, Simiula, and Bork 3D itself. The game engine uses OpenGL and OpenGL ES for rendering, and OpenAL for audio. It was originally sold under a commercial license. Today it is free open source software distributed under a permissive BSD-style license.