Spectrum is a stylised deathmatch mod for Unreal Tournament 3 (UT3) where players use lights to navigate and kill enemies. Set in complete darkness, players light the ground beneath them, leaving a trail of colour as they move.

Spectrum is designed to subvert traditional first-person-shooter play-styles by forcing players to use other sound, other players and items for navigation.

DM_Spectrum has also received honourable mentions in phase 4 of Epic's Make Something Unreal Best FPS Mod & Best Level categories (2009).