A Double Knock Out, or Double K.O., is an event that can occur in one-on-one fighting games such as Super Street Fighter IV or BlazBlue: Continuum Shift. In the case that both fighters reduce their opponent's health gauge to zero simultaneously, the round will end in a draw. Depending on the game, this can result in one of various scoring outcomes. In some games, both fighters are awarded a win for the round. In others, both fighters may be credited with a loss.