for two players, only 34 of 60 cards are used. three complete ghosts, two complete weapons, three motive, and three "no clue" cards are removed from the pack. additionally only rooms 1-4 are used and 5 and 6 are left empty. for three players, only 48 of 60 cards are used. two complete ghosts and one complete weapon is removed from the pack. all six rooms are still used.