This was once a quiet mountain town. Small, neighborly, a good place to live. Then, not long ago, people started to go missing. Hunters would vanish from the woods, people living alone would vanish without a trace, and everyone started to get scared. The local police searched the area, but couldn't find anything.
Then, one evening, a group rowdy bikers stopped by the local bar. They got drunk, started a fight, nothing out of the ordinary. Until someone got killed. It was an accident, really, the guy who killed him only meant to knock him out. But the man's head smashed against the bar, and he died a few minutes later. When he died, his body transformed into a monster. It had long, sharp claws and a horrible face, featureless but for an oversized mouth full of sharp teeth. This...this must be what had been killing people. The cops searched the man's house out in the woods and found 5 strange green pods. Man-sized, and empty. There must be four more of these...doppelgangers, out there.
People panicked. This was more then they could handle, and as the news spread people began to flee the town. Each night would find another person missing, and that panicked people even more. After a few days, only a handful of people were left in the town. That night explosions could be heard, and a great crashing of rock. In the morning it was obvious what had happened. Someone, or something, had taken dynamite from the local construction company and closed the only pass leading in or out of the town. Those of you that are left are stuck here.
You all met in the town hall to discuss things, and have come to the conclusion that the only way to solve this situation is to figure out who the doppelgangers are, and kill them. To do that, you will each vote on someone you think is a doppelganger. The person with the most votes will be killed. It's an odd solution, but you hope it will be enough.
Ok, game has started! Sending out Role PMs now.