Instead of a horde mode, what about an infected mode like that in CoD? One guy starts out as an infected and everyone else is human. If the infected kills a human, the human spawns as an infected. The match ends when all humans become infected. I think something like this would be great.
Or maybe another mode where one person becomes a suped up Bloater, and everyone else has to kill him. The Bloater gets massive amounts of health and OHKOs with melee while everyone else gets regular guns and stuff.







