I found this searching around on the internet...
Blind Date:
Notes: Works for any size group. But it is easier for smaller groups.
Required Props: Paper and Pen and Armbands.
Setup: There are two teams. Each player takes one armband for each team. Then they are given a paper that has the name of their team on it. Nobody can peak at the paper yet. All players go onto the field and separates from the others so they are alone. At that time they look to see what team they’re on. Then place the correct armband on. Then the game is started. It is a standard elimination game.
Goal: Get all members of the other side OUT.
I think it would be cool also, instead of elimination type game, make a mercenaries variant of this!