You have all agreed to be research subjects for studies on sleep and dreams. The researchers are primarily interested in psychological responses to terror and have invited you to participate in an overnight experiment. However, as the game progresses things spiral out of control. You all have a preset number of starting sanity points kept in front of you. You begin the game on the starting tile which will expand to create the game board. The game proceeds with players laying down tiles and moving from one tile to the next. Most of the tiles contain nightmares that slowly remove sanity points from the players who land on them. A few tiles do not initially remove sanity and you must strategize to take advantage of those. You also have action cards to impact player sanity, impacting the tiles or the other players. Cleverly combining tiles and action cards can do a lot of damage. All players lose sanity, and once a player reaches zero sanity they are out of the game. The person who keeps at least one sanity the longest wakes up with sanity intact, winning the game.