Single player social deception/body snatching/possession games?

The closest to these I've encountered are "Am I Nima" and "Who's lila?", as well as a small roguelike game called parasite.

I'm mostly looking for you playing some 'other' being (or just playing some sort of evil - murderer, cultist etc) trying to pass for a human, with remaining undetected/undiscovered being a core part of the game. Destroy all humans and Prototype have a small mechanical element of this, but i'm looking for it to be the main concept of the game or at the very least be very fleshed out.