Wombat
First Post
In my current campaign, I have given one of the players the task of secretly being an agent planted in their midst by the government of the district. He is to look for incriminating evidence that could be used to shut down the organization. So, yes, in many ways his character is actively working to destroy the party he is in. So far this has worked out very well -- he has kept his cover beautifully and the others have no notion what is going on, other than the fact that the government seems to know about their movements pretty well.
In another campaign (Ars Magica), I had a character fall under the sway of a demon-possessed magical item, again setting the worm in the cheese. That played out staggeringly well, with an eventual showdown and PCs turning on PCs. Everyone thought that this was one of the best and most dramatic short-run campaigns (ran 10 episodes) that they had ever been in.
In another campaign (Ars Magica), I had a character fall under the sway of a demon-possessed magical item, again setting the worm in the cheese. That played out staggeringly well, with an eventual showdown and PCs turning on PCs. Everyone thought that this was one of the best and most dramatic short-run campaigns (ran 10 episodes) that they had ever been in.