Let's name them, then. We already mentioned Quake.There are tonnes of alternative fast-paced arena based FPS games...
Whatever else you'll go play, you'll end up craving for a shock combo.
I love Warsow, but the last time I saw anyone in a server for it was over a year and a half ago...
Cube, Nexuiz, and OpenArena come to mind. Others here, and those are just the free ones.
I find it interesting that all of those and Warsow are basically just based off of Quake's gameplay.