File:Quake1.gif File:Globe.png GLQuake is a source port of Quake that uses the OpenGL graphics library, and was released on January 22, 1997. It was officially made by Id Software, but is not supported by them. It was created as a test for Quake 2's hardware support. With the edits made to the game, they carefully corrected many of the issues found in the original DOS version, which was known to have some framerate stuttering, albeit not the point that would make the game unplayable. GLQuake is responsible for almost every unofficial modern source port.