Half-Life 2: Deathmatch is a multiplayerfirst-person shooter video gamedeveloped by Valve Corporation. Released on Steam on November 30, 2004, it uses many of the assets fromHalf-Life 2 and its Source engine. It features new levels, optimized for multiplayer arena play, and a few new weapons. Also included are portions of the game's source code, which were the basis for many early Source-based multiplayer modifications. The game is the successor to the popularmultiplayer component of the originalHalf-Life, but is offered as a separate product from Half-Life 2. Deathmatch, like Half-Life's multiplayer, does not develop any part of the plot or story of the Half-Life series.