Enjoy fast-paced multiplayer gaming with Deathmatch Classic. Valve's tribute to the work of id software, DMC invites players to grab their rocket launchers and put their reflexes to the test in a collection of futuristic settings.
Had a blast after making a server and waiting for other players to join, unfortunately the playerbase is pretty small these days so you may be waiting a while
Essentially it's Quake but in GoldSrc engine, and it's as fan as it sounds but sadly the game's completely dead non of the servers are populated.