In case quitting out doesn't work, play a custom game with 2 players. Set it for one round, one life (no respawning), doesn't matter what game mode.
Then have the second person commit suicide. Jump into a chasm, grenades, rockets, whatever. It's about as quick as quitting out.
Yeah, I don't have it yet, but that's how I've been getting these for the map specific ones and it works like a charm.