Well having thought a little bit more, I can see the potential here.
Imagine that they take this to the next level. You then have like a real marine (NPC) killing off Zombies and other kinds of Monsters in a sort of a controlled fashion. Then, you have to clean it up, but have to avoid the monsters and the zombies that the "true hero" of the game is killing.
You also have the corporation hammering your head telling you how fast they want the building cleaned because they want to make new dark experiments just after the "real hero" kills off their last experiments. So not only you have to avoid monsters, you also have to clean right after they spill blood all over the place.
I sense some potential hilarity in this concept. It can even serve a story.