In Spelunk or Dunk players are racing against rising waters to get out of the cave with the most gems. The water rises faster and faster each round and carrying those valuable gems is going to slow you down. Players all start out by creating their working hand of cards to use throughout the game. Each round all players play 1 card and then figure out how far they get to move towards daylight. Some cards are better if more people play the same card and others are better if you are the only one. Elements of the prisoners dilemma and push your luck make for a tense game with lots of player interaction and laughs. —description from the publisher