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. And with this devious assortment of players, the backstabbing and masterminding will be just as intense off the field as on the field. Trust. No. One.