Day of the Tentacle/YMMV


 * Adaptation Displacement: It's a sequel to Maniac Mansion, but a lot of gamers didn't even know since the game itself never states this, despite making numerous references to its predecessor. Fortunately, the original game is included as a game-in-a-game in the sequel (by "using" Ed's computer), though folks emulating today with ScummVM need to put in a little extra work to play it.
 * Nightmare Fuel: Ed Edison is probably the creepiest character in the game.