I've personally worked on this mod for almost 15 years. I never cared about its popularity so I guess not many people know it. Right now I think it reached that level of quality I can show to other people. (^_^) XDM features many hi-quality maps, some of which were created by TWHL members as well; different game rules, many weapons, GUI (even winamp-like mp3 player), botmatch, vast modding capabilities, VS6/2010 code, and lots, lots of other features.
Game rules are: Deathmatch Team deathmatch Capture the flag Domination Co-Operative Last Man Standing Revenge mode Singleplayer