Truth or Dare? is a party game requiring a minimum of two players. The game is very popular with adolescents, but is also played by some adults.

One player starts the game by asking another player, "Truth or dare?" If the queried player answers, "Truth", then the questioning player asks a question, usually embarrassing, of the queried player; otherwise, if the queried player answers, "Dare," then the questioning player asks the queried to do something, also usually embarrassing. If the question or dare is unreasonable (the exact definition of unreasonable varies from one playing group to another), then the player may demand another question or another dare instead. After answering the question or doing the dare, the queried player asks "Truth or dare?" of another player and the game proceeds as before. The game can also be played in teams, with all players in a team having to participate in the dare or answer the question.

The dares traditionally involve kissing someone or something you do not like, people or dustbins. Truth traditionally also revolves around Love or other embarrassing things the person is supposed to have or do. Rumours play a big part in choice of questions.

There are also many variations to Truth or Dare. Some of the more popular ones are "Strip or Dare" and "Drink or Dare." In these versions, players do not get a choice between "Truth" and "Dare," but must instead do a dare or suffer the consequences (Drinking or Stripping, as the case may be).