While reading the Survivor thread I started wondering (again) if anyone had ever made a successful Survivor-type game online. Or one that at least had some semblance of the backstabbing, alliances, etc. While nothing island-y came up, a browser based game called Town of Salem showed up. And as luck/fate would have it, it just released on iOS and Android as well.
So I fired it up thinking they'd do a tutorial, but it just threw me into a game with real people and I had no clue what was going on. Basically it's like one of those party murder games. You get assigned a role (good or evil) and then they go through a day/night cycle. Evil players' goal is generally to kill or subjugate everyone, good players need to expose all the evil players. There's definitely elements of lying and backstabbing involved, though not much in the way of alliances. You don't get much time to actually talk/socialize so that aspect doesn't seem to come into play much. Of course inherently the role you get puts you into an alliance with others, it's just you don't know for sure who is really with you.
All in all a pretty cool concept and it ran pretty smooth for an online game with total strangers. Would love to see someone develop something like this but with more Survivor elements.