Deathmatch Patch v1.0.0.33 + AutoUpdate Half-Life 2: Deathmatch  is a  multiplayer   first-person shooter   video game  developed by  Valve Corporation . [1]  Released on  Steam  on November 30, 2004, [2]  it uses many of the assets from  Half-Life 2 , and the same  Source engine . [3]  It features unique