Betrayal at House on the Hill/YMMV


 * Nightmare Fuel - Okay, so yeah it's a board game, but seriously, read some of the events (like "Funeral," "Burning Man," or "Hanged Men" to name a few) and then imagine really experiencing them while exploring in a creepy haunted house. *shudder*
 * After a few rounds, you'll likely start to have a silent group consensus on who should read all the cards and the scenario texts, based simply on who has the best voice and style.
 * Paranoia Fuel - Anyone could turn out to be the Traitor, and you won't have any idea who until the Haunt begins. That player who's doing well for themselves and becoming your strongest ally could become your worst enemy... or your best line of defense.