If I were a braver man and weren't so scared of learning to code I would try to do this myself...
Would it be tricky to throw together a mod that does something like this in MP (local co-op):
-Trigger: Any player dies
-Spawn 10 zombies near random player
-Trigger noise on said random player to draw zeds to them immediately
-Add a counter to create +5 additional zombies next time this event is triggered.
Easy? Difficult? Could someone throw that together for me? I'm trying to get my buds to stop friggin dying all the time without consequence, while also adding a challenge for everyone else.