Anti-Monster SWAT/Mercenary game or mod?

[siomasm]

Been reading an awesome book lately (Monster hunters international)and it got me wondering if there's any game with a similar premise.
Basically, the player is a mercenary who hunts down supernatural creatures for bounties. Randomly generated levels and monsters based off the difficulty of the mission, use cash from missions to get better gear...kind of like X-com or syndicate in a sense but less saving the world or building an organization and more of just killing monsters and getting cash.

Sound like anything you know?

 

[Ratty]

Sounds like Killing Floor, which is awesome if you like co-op games.

Spoiler: Old Trailer

Except for the randomly generated levels part, for that you might want to try Paranautical Activity.

 

[josemlopes]

When I read "Anti-Monster SWAT" I was reminded of this:

Spoiler: Infiltration Unreal

Basicly take the most "tacticool" realistic mechanics and weapons in a sci-fi setting with aliens, seems kind of fun as the enemies are basicly in a different set of rules from the players. Kind of like having an Arma character fight a Quake character.

More on topic though I cant really think of anything that similar. There are certainly some games that do the "Hunt special enemy X for money" but its usually sidemissions type of things with not that much content.