These materials might be useful for general reference:
- The Official Doom FAQ
- The Unofficial DOOM Specs
- The Page of Doom at Doomworld.com
- Lee Killough's Doom pages
- The Doom Legacy Wiki — note that this is not GFDL, and material from the Legacy Wiki should not be copied into the Doom Wiki
The following may be copied directly to this wiki:
Community content is available under CC-BY-SA unless otherwise noted.