Don't know if this is already a thing, since I barely see people playing Zombie Massacre right now.
I feel like some things, primarily the spawn rate probably, should scale with more players in the lobby.
What do you think?
There already is spawn rate scaling. It's not very extreme, though.
It's nonexistant pratically. All it takes is that one mercinary (it's always a mercinary) to run off to the right of the map and deprive all the spawns for everyone else to realize just how horrible the scaling is in 6 player. What's worse is when there's two mercinaries at the right and an electrician set up at the left in those cases there's FA to shoot at because all of the spawns are already taken.
Optional and meaningful difficulty settings on top of scaling would also be nice.