If you are interested in a full port of OpenGL on NT, click here . There MAY be a Linux version coming out in September. Irix has its own version of GLQuake, called SGI Quake. This project was not done by id Software, but by an employee of SGI with id assistance. You need at least an O2 to run this port with hardware acceleration.
More info is available here or here .
DOS appears to be dead. This will start glquake in a window on your desktop instead of switching the screen to lower resolution and covering everything. 384 Tries to run glquake at the specified resolution. Combined with -window, it creates a desktop window that size, otherwise it tries to set a full screen resolution. These need to be either stretched out to the next higher size, or shrunk down to the next lower.