http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=129326766

Here is a mutation that puts a spin on Survival mode. You start with a pistol and medkit, all initial pickups are removed. Weapons and items spawn at random points at certain intevals, with the weapons only having a few clips of ammo. It's a lot like the scavenger game mode in Battlefield 3.

This feels a lot harder than regular survival, I can hardly last 3 minutes with bots.

Current issues:
Spawns don't get deleted after a wipe. None of the game events fire after they've been placed.
No good way of removing empty weapons (no known way of reading the ammo count).

Possible improvements:
Random spawns based on nav mesh. Would need an interface to the nav mesh.