Paranoia is something I really strive to get from the players while DMing. When they’re paranoid, you know that their involvement in the game has passed from the purely abstract to a kind of belief in the drama that’s unfolding. Players are left a little unnerved or worried in a pleasantly omniscient sort of way. It’s similar to the experience of reading an especially effective piece of horror lit. They never approach the level of terror that could induce an actual panic attack. Not that I want to inflict that experience on anyone necessarily, but what if that degree of paranoia befell the character? What sort of bizarre behavior might result? And how would paranoia — as a game element and system — affect play overall?