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Mystery Box


Mystery Box Mobile Slots

Are you looking for a online slots show like no other, filled with fabulous Free Spins, wondrous Wild symbols and a Mystery Box mini-game that guarantees you a multiplier prize? Then all this and more is boxed up into one show-stopping online slots game, Mystery Box – right here on Cashmo mobile casino. Get ready to take to the 20 locked win lines and see if you’ve got what it takes to beat The Boss!

To become a contestant on Mystery Box online slots, your mobile and tablet devices will need to be running iOS 12 on an iPhone 6 or above or Android 5.1 and above. You can play this or any of our online slots games for real, with one of our casino bonuses or by making a deposit into your account, using any of our available deposit methods – including pay by phone bill!

It’s no mystery that Cashmo is home to some of the best casino bonuses around, including our incredible potential Welcome Bonus of up to 50 Free Spins with no deposit required*!  All you need to do to claim your Free Spins Bonus is to create an account. Once you’ve registered, spin the lobby game to determine how much bonus you’ll get to spin with.

*18+. New players only. Up to 50 (18p) locked free spins to use on Rainbow Slots. Win paid as bonus credit. 40x wagering requirement. 7 day expiry. £50 max withdrawal from bonuses without a deposit across all Intouch Games Accounts; mFortune, Mr Spin, Dr Slot, PocketWin, Casino2020, Cashmo, Bonus Boss, Jammy Monkey. T&Cs apply.

Mystery Box Mobile Slots Index

How to Play Mystery Box Mobile Slots

  1. Set your total bet amount. Before you can star in the Mystery Box show, you will need to set your total bet. This is calculated by multiplying your bet-per-line by the number of active win lines in play, which on these golden reels are locked to 20. To adjust your bet-per-line, use the ‘+’ and ‘-’ buttons, found in the ‘Bet’ menu in the bottom-left of your screen, the minimum you can bet is 1p and the maximum is £10. If you were to bet 10p per line, your total bet would be £2 per spin.
  2. Check the paytable. As a contestant on Mystery Box, you might want to get familiar with the slots symbols and how you can spin in a win. Before going live, we suggest visiting the paytable, which is located in the Menu, at the top-left of your screen.
  3. Understand reel wins. Your reel wins pay from left to right across your 20 locked win lines and the value of a winning combination will depend on the type of symbol you’ve spun in and how many of them there are on the win line. For some symbols you’ll need 2, whilst for others you’ll need at least 3. To learn more about these showbiz slots, visit the paytable.
  4. Spin the reels! Once you’re ready for the episode to begin, press play, by tapping the ‘Spin’ button and watch your reels start to spin!

Wild Symbols

You could be going wild if you spot this contestant on your reels. Not only is she dealing with The Boss, but she’s also acting as your Wild symbol. The Wild is an A –Star standard symbol and has the ability to take the place of almost all other symbols to try and open up a win.

For example, if you were to spin 2 ‘Q’ symbols in on a win line, you’d have just lost out on a win. However, your luck could be about to change if there’s a Wild symbol, as it will take the place of a 3rd ‘Q’ symbol and award you with a multiplier prize!

This symbol is no phoney, but there are a few things she cannot do. The Wild is unable to take the place of Free Spins or Bonus symbols and can’t sweet-talk its way to the progressive Mega Jackpot. To walk away with the prize, you’ll need to spin in all 5 Jackpot symbols on a win line.

Mystery Box Mini-Game

Things are about to get pretty golden if you spin in 3 or more Gold Box symbols anywhere on your reels, as you’ll have just opened up the Mystery Box mini-game. The more symbols you enter with, the bigger the potential multiplier prizes.

Now is your turn to step into the spotlight. In front of you will be 18 golden boxes, each containing a mystery multiplier. Once you’ve chosen your box, you will select 3 additional boxes to be removed from play and their corresponding multipliers will disappear from your screen.

The Boss will then call you up to make you a multiplier offer. Accept and you’ll head back to your reels with that prize; decline and you’ll continue on and remove a further 3 boxes. This will continue until you either accept an offer from The Boss OR you get down to the final 3 boxes.

Here you will be asked if you would like to stick with your original box, or swap it for one of the remaining two still in play. Once your choice is made your golden prize will be revealed and you’ll head back to the main reels a Mystery Box master!

Free Spins

Whilst you’re spinning through the slots show, make sure to look out for the fabulous Free Spins symbol. 5, 7 or 9 free spins are awarded when you spin in 3, 4 or 5 Free Spins symbols anywhere in view on your reels.

These spins are locked to the value of your last paid for spin. You won’t be charged from your in-game credit though, as these spins are a gift from The Boss, to say thank you for playing.

Once you’ve used up all your free spins, you’ll head back to the main stage, where you’ll continue on the hunt for the Mystery Box multipliers. Any winnings from your free spins will have already been added to your on-screen credit.

Progressive Mega Jackpot

The occurrence of 5 (five) “JACKPOT” Jackpot symbols on an active win line awards the progressive Mega Jackpot. The progressive Mega Jackpot is available on any bet, with 0.025% of the bet being added to the progressive pots. Half of the value gets added to the current jackpot, and half to a reserve pot ready for the next winner.
The Mega Jackpot starting value is £50,000, with even higher starting prizes possible with a built up reserve pot. The Mega Jackpot promotional pot system is available over any stake on any participating game plugged into the Mega Jackpot promotional pot.
When the Jackpot is won, it is reset and begins to rise again. Simultaneous wins can occur. If a player wins the progressive Mega Jackpot then a notification would occur BEFORE any other player was awarded the Jackpot. Any players in a game that contributes to that same Mega Jackpot will receive the on-screen notification of a reset the next time they press the spin button if it is within 10 minutes of the jackpot being won. Players will not be charged for the spin generating this notification.
In the event of a communication error after a progressive win result has been determined and before it has been displayed on screen, the win amount will automatically be transferred to the player’s account. While the game is live, the Jackpots cannot be terminated.

Payout Information and Game Rules

Mystery Box mobile slots has a theoretical return to player of 94.03%. This is based on long term playback. System malfunctions void all payments. Monies are staked in the following order: winnings, player deposits, bonus credit.

Cashmo general terms and conditions apply.

Looking for more Bonuses?

Want a chance to win some more Free Spins without deposit? Check out our Sister Site Mr Spin. There are potential No Deposit Bonuses for new and existing players! These bonuses could get you some Free Spins, Bonus Credit or Deposit Boosts to play with on Mr Spin’s fun games.

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