MYSTERY BONUS MUST HAVE TUESDAY - EVERY TUESDAY! Login into 21 Prive online casino and see what the bonus of the day is. Play on any game and 10 players stand the chance to win a mystery casino bonus. Players will be notified on Wednesdays. Make a qualifying deposit on the day of the Bonus offer. Any deposit made until 23:59 CET on the day of the offer counts. Simply check the mystery bonus percentage the in the bonus drop-down menu on the deposit page or contact our Support in Live Help. All winners will be notified via email. You can use your bonus funds to play most video slot games at the casino which count towards the 35 x wagering requirements. Stakes on certain games do not count in full towards the wagering requirement. For all Promotional Terms and Conditions please click here. Bonus offers run from 00:00 GMT until 23:59 GMT on the specified day of the offer. 21 Prive is a NetEnt casino and accepts players around the world.