Concept is a guessing game that uses no words. You try to communicate an idea by placing tokens on a board filled with icons. You link concepts together to guide the other players. It sounds simple but gets tricky when the words are abstract. There is no turn timer so people just shout answers until someone gets it right. We usually ignore the scoring system completely and just play for fun. It handles large groups well and people can drop in or out freely. A nice alternative to traditional drawing or acting games.