Bonus
100
Rollover
x10
Minimum Deposit
20£
Term
24h / 7 days
Bonus expires on
31 December
Monster Casino introduces a mid-week promotional boost for curious slot players looking to expand their daily sessions. The “Mystery Box” campaign operates as an interactive mini-game running from Monday to Thursday. Every qualifying daily deposit unlocks a virtual box that guarantees a random batch of complimentary rounds, allowing you to secure up to 400 extra spins over the course of the week.
- Guaranteed rewards: Every unlocked box contains a surprise batch of free spins; there are no empty drops.
- Daily resetting fun: The promotion can be claimed once per day throughout its weekly availability cycle.
- Competitive playthrough terms: Everything you win from your mystery box spins is attached to a player-friendly wagering requirement.
🕹️ How It Works & Prize Probability
Activating your daily surprise requires navigating the cashier and utilizing the correct promotional trigger:
- Log In: Access your account during the active mid-week period.
- Deposit with Code: Deposit £20 or more via the casino cashier using the promotional code MBOX.
- Play the Game: The system will instantly grant you 1 access token to the Mystery Box minigame. Open your box to reveal your random prize pool.
📊 Prize Drops and Odds
The number of free spins hidden inside your daily box is determined by the following random percentage metrics:
- 25 Free Spins: 36.5% chance
- 35 Free Spins: 36.5% chance
- 45 Free Spins: 10.43% chance
- 55 Free Spins: 10.43% chance
- 65 Free Spins: 5.21% chance
- 100 Free Spins: 0.94% chance
📌 Terms and Conditions & Wagering Framework
- Availability window: The promotion runs every week from Monday at 00:00 GMT until Thursday at 23:59 GMT.
- Minigame expiration: Once you receive a Mystery Box token, you must play the minigame within 24 hours, or it will expire.
- Low 10x wagering: Any winnings generated from the free spins are credited as bonus funds. You must wager these winnings 10 times (10x) on eligible games before requesting a withdrawal.
- Shelf life: Once the spins are played, you have 7 days to complete the 10x rollover target.
- Cash cap: The maximum real money conversion allowed after meeting the wagering requirements is capped at £20 per box.
- Exclusions and warnings:
- Deposits made via Skrill or Neteller do not qualify.
- You must load funds via the standard casino cashier only.
- Submitting a withdrawal request while your bonus is active or pending will immediately void all promotional funds and winnings.



