So, I'm starting up a game of Dark Heresy with some friends, and one of my players is the kind to play a villain amongst heroes. Besides the obvious difficulty of hiding such heretical ideas amongst the Inquisition, how can I make it work so that, even when he hits 100 corruption points, he can still play as a main antagonist character?
To rephrase the question: When his character hits the point of no return, can I have a way for him to play as the main antagonist, or do I take over the character at that point and have him reroll?