Russian roulette

"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. The game is usually depicted being played with a six-chambered revolver, and so each turn entails a one in six chance of death." (Wikipedia)

Two games survived, four more to go