Fans of "Terrorist Hunt" in Rainbow Six may see some similarity to this gamemode, however we're working on making "Merc Hunters" different in several ways.
The first difference is that NPCs start off as somewhat weak - only being armed with pistols, eventually progressing to wielding heavier weaponry. I'm toying with the idea of having some maps progress onto heavy vehicles / helicopters as sort of boss type enemies, it depends how feasible that is (and more importantly, if that's fun or not).
The second point is that players will have a time limit (there won't be endless spawning enemies in this like in Nazi Zombies). I'm hoping we can give players the ability to extend the time limit if they want to do so, giving them a choice for bugging out if things get too hard.
We'll have a number of maps for this gamemode, the first of which I should mention is one called "Gunkanjima" by the very talented JimOnions
I'm also working on porting a previously unreleased map of his called "Frozen", which is set on a mountainside. Needless to say, it's a fine looking map and should be great fun to play!
Another map for this gamemode is a map of mine called "Rusland". It's not really set with anywhere specific in mind (just somewhere vaguely Russian), I've been working from a variety of references to produce this. It's been quite nice to work on this as a break from the other large scale maps I've been making for the main game mode.
I still want to add a great deal more detail to the map, so I'll be posting more pictures of this as I develop it.