Well, the movie's set around a Norse village that's being harassed by these mountain people that they know nothing about, the main thing with them being that they only attack under the cover of fog or extreme darkness, so they're never seen. They drag any of their dead away so no bodies can be studied and it seems like none of them are killed in the attacks, and they're very animalistic in dress and such, so they don't even really seem human. They turn out to be just human cannibals who worship bears, and a small detachment of Viking warriors go to sneak into their mountains and kill their bear queen lady. It's a pretty solid action movie. I don't know if a plot like that can really be shifted into an RP form, but it could probably be done.