I hacked this together in about 20 minutes. It needs work still and might sound a bit cheesy in places, so feel free to improve it. Also, I'm a bit worried about the Coop section, the last bit seems really similar to the entry on the Doom Wiki, despite not having read it until after I wrote this. --EarthQuake 20:06, 30 March 2006 (CST)
OK, fixed it up a bit and added some more details.