Half-Life 2: Deathmatch was released on November 30, 2004, and supports online multiplayer matches with up to 16 players by default (with higher limits possible on custom servers). It is a physics-driven first-person shooter built on the Source engine, centered on arena-style combat using the Gravity Gun to manipulate environmental objects as weapons. The game features Deathmatch (free-for-all) and Team Deathmatch modes, with gameplay emphasizing movement control, map knowledge, and creative use of physics-based interactions alongside conventional firearms.