Half-Life Deathmatch: Source

Half-Life Deathmatch: Source launched on May 1, 2006 as a straight port of the original Half-Life multiplayer mode to the Source engine — a complete, self-contained product with no post-launch content roadmap or DLC. Valve has applied occasional maintenance patches over the years, most notably a 2013 update that added Linux and Mac OS X support, a 2021 security and stability patch, and a February 18, 2025 update that added 64-bit support, UI improvements, and technical fixes ported from the Half-Life 2: 20th Anniversary Update. None of these updates introduced new game content such as weapons, maps, or modes — they are technical and compatibility improvements. There is no DLC, no announced future content, and no developer statements about planned expansions or a content roadmap. The game has been maintained in working order but reached its content-complete state at launch.