A game mode where all players are (supposed) to be crates. In other words, it's prop-hunt mode for Unreal Tournament 2004, if all the props had guns.
CrateDM v1.81 beta. The creator of this .zip file has no affiliation with the original author of this mod.
To install, extract the folders to your Unreal Tournament 2004 folder ("...Steam\SteamApps\common\Unreal Tournament 2004"). Under Instant Action or Host Game, select the CrateDM or Crate Team DM game modes.