John Tsakok, assisted with Adrian de Lotz brings us their Half-Life 2 Deathmatch mod, Decloak: Source. As the name implies, the modified game play uses cloaking as an element for a round based cat and mouse competition. Rebels armed with exclusive stealth abilities run to exit points on a map where the Combine, through the use of de-cloaking flashlights stand in their way. The combine flashlights work by decloaking any rebel that happens to be in the range of the beam. Power though is just as limited as the flashlights you use in regular Half-Life play. Using the original game's assets and artwork, the mod chooses to introduce new and interesting ways for stealth game play.
trailer
http://www.youtube.com/watch?v=hlQxRP0_8sQ
http://www.ornetwork.org/decloak/index.html
http://www.ornetwork.org/decloak/download.html
http://www.fileplanet.com/175001/170000/fileinfo/Decloak-:-Source-Beta-1a-Client-Installer