== UDM1 ==
[[Image:udm1map05.png|thumb|left|200px|UDM1 MAP05, by [[Dean "deathz0r" Joseph|deathz0r]]]]UDM1 was released on January 1st, 2002. Containing sixteen deathmatch maps, two deathtag maps, and two parody maps, it became an instant hit in the deathmatch community. Notable DM mappers such as TLSDM's ChronoHunter have cited UDM1 as the source of their inspiration to map.
== UDM2 ==