I just had the sweetest idea ever.

So, you're a guard in some out of the way, but important, Cold War Soviet base. It's chock fucking full of rats. Everytime you call in a false alarm, the commandant gets pissed off and reduces the base's maintenance and resupply funding by an assload of rubles just to spite you. You don't get to buy traps until level ten. The beauty of this is that there needs to be an actual button you press that says "it's just a rat." Obviously there are terrible consequences if you press it at the wrong time.