I was going to make this myself, but now I have no motivation and don't feel like doing it.
For this you would need to edit multiple saves, except Afghan DM. Saves included:
- ACM City
- Afghanistan DM
- Beta City
Beta and ACM City would need more spawns and weapons placed.
This would be a standard rotation Deathmatch. It would use the same technique as Rampage Mode with levels, time limit and scores. The time limit could be 5, maybe 10 minutes. The levels would obviously be the listed saves, and I'm not too sure about the scores though.
Each round would last five minutes. It's starts just like Rampage Mode with a locked camera view on the current map. Then the players are spawned and fight to the death. After the round is over the player with the highest score is focused on (Spy) and it is announced they won that round. Then the build is cleared and the next one is loaded. It repeats.
I'm not too sure what would happen after you go through all the levels though. I would prefer this to be as close to default as possible. You get the idea.