|Two of them are actually blood thirsty doppelgangers.|
Doppelgangers: Attack Of The Unknown, also known as "Doppelganger" or "Doppel", was a collaborative survival game created and hosted by Arby. Starting out with a quite simple pretext, this game ended up being quite popular. Various games were hosted by different members as were created more complex variants.
The game consists of an undefined number of visitors held prisioners within a mansion. Among those there are humans who must survive by killing doppelgangers, who must kill said humans. Depending on simple commands such as "walk" and "attack" to work, the fun of the game actually comes from paranoia rising among the living: Who must I kill? Is that guy an enemy? .