I need some mindless deathmatch games so I have something to do with my hands while I listen to music. I used to enjoy low gravity and fast movement servers in half life and gmod a long ass time ago but idk if those are still around.Anything similar that induces that trance like state would be good.
AssaultCube exists, usually there's one server with 8 to 16 (the maximum) players. It's also freeware (and open source)