Plot: To celebrate the 30th season of The Challenge, MTV is bringing back the dirtiest and most unpredictable players in The Challenge history for the biggest prize ever - $1 MILLION DOLLARS! This devious bunch will stop at nothing to win the game and compete against each other on The Challenge XXX: Dirty 30. Fifteen men and fifteen women will have to fight their way through some of the craziest, most daring challenges yet