Im workin on something pretty cool, mabey even Bungie Fav cool, but here are some other good ideas:
1. Fight Club (2x overshield, only plasma pistals, Melee fighting only)
2. Death Room (One life, one infected, infected drops objects into a closed hallway filled with Man Cannons that will push the items into the Humans)
3. Dodgeball (two relly close closed platforms [closed as in no exits] with an unjumpable pit between them, players only throw nades and if they fall into the pit they go super slow with King of the Hill Gametype)