I had this idea a while back. But I think it would be fun in the context of a massively parallel action or arcade game. Imagine an assault on Normandy. Continue

I had this idea a while back. But I think it would be fun in the context of a massively parallel action or arcade game. Imagine an assault on Normandy. Continue till you get killed, then jump back in time into someone else. If you manage to take out the guy you got you last time, that character is available to play to continue from that point on. It could also work with a zombie invasion, and as an MMO.