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€2M Mystery Booster Prize Drops Tournament

leon-travers
By Leon Travers
08 Jul 2026
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Leon Travers 08 Jul 2026
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  • Win a share of €2,000,000 via random prize drops
  • Over 10,000 mystery boxes waiting to be opened
  • Win anything from €5 to €200 per box
It’s the summer of prize drops promotions at MostBet Casino, as the new €2M Mystery Booster Tournament goes live.

The tournament runs from 29 June to 19 July 2026, giving players the chance to trigger random mystery box rewards while spinning the reels on a wide variety of casino slot games.

Any real-money spin in a participating game can activate a prize drop. There are 10,250 Mystery Boxes available in total, and each one contains a cash prize worth €5, €10, €20, €75, or €200.

Learn more about this bumper promotion, including how to participate and what games you need to play, by reading this page.

How the MostBet Mystery Booster Tournament Works

The Mystery Booster promotion uses the same prize drops format as several other recent MostBet Casino tournaments. 

To take part, simply play any of the listed participating slots with real money, with mystery boxes randomly dropped on any spin, regardless of your stake.

All winnings are instantly credited to a player’s real money balance with no wagering requirements. This exclusive tournament is only open to registered players. For anyone who doesn’t have an account, sign up with our promo code HUGE and select your preferred MostBet welcome bonus before playing.

How to Join the Mystery Booster Promotion

Joining the Mystery Booster tournament is straightforward. There is no bonus code to enter and no separate mission to complete. Players only need to spin eligible games with real money while the promotion is active.

  1. Log in to your MostBet account
  2. Go to the Mystery Booster promotion page and click ‘Participate’
  3. Open any participating slot game
  4. Place a real-money spin
  5. Watch for Mystery Box drops
  6. Collect your reward

Mystery Booster Prize Pool


The Mystery Booster Tournament has a total prize pool of €2,000,000, split across 10,250 Mystery Boxes. Every box contains a cash prize, with five possible reward values available:

  • €200
  • €75
  • €20
  • €10
  • €5

Once a Mystery Box is won and activated, the cash prize is credited to the player’s MostBet account. The remaining number of prizes is also shown in real time inside the tournament lobby, so players can quickly check how many mystery boxes are still available before they continue spinning.

Participating Games


A standout feature of this promotion is the assortment of eligible slots. Players can choose from more than 100 titles, including:

  • Fruit Fiesta
  • Beauty Fruity
  • Miami Beach
  • Magic Stars
  • Jelly Reels Hold the Jackpot
  • Hot Party Deluxe
  • Sizzling Bells Hold the Jackpot
  • Wild Girls
  • Mighty Wild Panther
  • Burning Sun Hold the Jackpot

You can find a full list of the participating games on the Mystery Booster promotion page.

Key Terms for the MostBet Mystery Booster Tournament


Before playing, it is worth checking the main rules of the Mystery Booster promotion:

  • The tournament is open to registered and logged-in MostBet.com users.
  • It runs from 29 June 2026 to 19 July 2026.
  • Only real-money spins in participating games count.
  • Any real-money spin can trigger a Mystery Box prize drop.
  • Prizes are awarded randomly from the remaining prize pool.
  • Cash rewards are credited automatically after activation.
  • The remaining number of Mystery Boxes is shown in real time.
  • MostBet’s decision is final in any disputes related to the promotion.

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