Does anyone remember the old Jailbreak mod from Quake/Quake 2? If not, the idea is that every opponent you kill appears in your team’s jail. Once all are captured, you win the game. Those in the jail can be rescued by their teammates or try and break out themselves.
This Source version of it looks completely and utterly insane, and that’s awesome (and using Thin Lizzy for the music is awesome too)!