Russian roulette is a lethal form of gambling in which participants place a single round in a chamber of a revolver and, spinning the cylinder such that the location of the round is unknown, take turns putting the weapon to their temples (heads) and pulling the trigger until the weapon discharges, killing the user. The game is usually depicted being played with a six-chambered revolver, and so each turn entails a one in six chance of death. As soon as a player dies, the other wins the game.
The game is played for various reasons, often as a form of high-stakes gambling before a crowd of betters, or sometimes as a show of bravado before a witness or as a form of less-culpable suicide, performed alone or with others. Russian roulette is a highly secretive practice, and the number of deaths caused by it is unknown, although likely to be small, as the game owes more to myth than reality.