Mystery 7s

Mystery 7s Online Slots

There’s no mystery about how good Mystery 7s online slots is. This seven-ly casino classic from Bonus Boss is filled with plenty of action and king-sized wins. With 9 locked win lines to explore, you could uncover fabulous Free Spins, Wild symbols and a mini-game that will take you to 7^th Heaven!

To take these lucky 7 reels for a spin, you’ll need a mobile or tablet device that is running iOS 10 or Android 5.0 and above. We have plenty of casino bonus offers waiting for you, including the free welcome bonus no deposit required! So, if this is your first time visiting Bonus Boss UK casino, then you could get up to 100 Free Spins* – no deposit required – when you sign up and create your very first account.

*18+. New Players only. Up to 100 (30p) locked free spins to use on The Spinfather. 40x wagering requirement. 3 day expiry. £10 Max Win from playing the bonus resulted from playing the free spins T&Cs; apply. BeGambleAware.org

Mystery 7s Online Slots Index

• How to Play Mystery 7s Online Slots
• Reel Wins
• 7^th Heaven Mini-Game
• Wild Symbol
• Free Spins
• Progressive Mega Jackpot
• Payout Information and Game Rules

How to Play Mystery 7s Online Slots

1. Set your total bet amount. Before you can take to these show-stopping slots, you’ll need to set your total bet. Tap the ‘Bet’ button in the bottom-left of your screen and use the ‘+’ and ‘-’ buttons to adjust your bet-per-line amount; the minimum you can bet is 2p and the maximum is £5.00. Your total bet is calculated by multiplying your chosen bet-per-line by the number of active win lines, and in Mystery 7s they are locked to 9. So, for example, if you were to bet 20p per line, your total bet would be £1.80 per spin.
2. Check the paytable. To see what mysteries these reels hold, you can visit the paytable. Found in the top-left corner of your screen, the paytable will give you the need-to-know information about Mystery 7s.
3. Spin the reels! Once you’re ready to get the reels turning, simply press the Spin button!

Reel Wins

On these seven-ly slots, wins are a multiplier of your bet-per-line and will pay from left to right across your reels. Wins depend on the type of symbols that you spin in and how many align on a win line. In this casino classic, for some symbols you’ll only need two to line up, whilst for others you’ll need at least three.

So that each symbol isn’t a mystery to you, make sure to visit the paytable to find out how you can spin in a winning combination.

Any winning lines will be highlighted on your screen and will be added to your in-game credit automatically. You can only win once across each individual line, however, wins across several lines will be added together to form one total prize.

7^th Heaven Mini-Game

Are you ready to visit 7^th Heaven with our magical mini-game? To enter this fun-filled feature you will need to spin in 2 or more Mini-Game symbols anywhere on a win line – the more symbols you spin in, the bigger the potential prizes!

Once inside, you’ll come face-to-face with a path filled with multiplier prize values. There is also a numbered wheel, which you spin each time to determine how many places you’ll move across the board.

As you move across the path, you’ll collect each multiplier that you land on. If you come to a stop on a Mystery ‘???’ tile, you could win yourself a hidden prize of up to x400!

The game will come to an end when you land on a ‘Collect’ tile, so the more you keep on spinning the more you’ll be winning! Any winnings will be added to your in-game credit automatically.

Wild Symbol

There’s no mystery surrounding the infamous Wild symbol. This slot-stopping symbol has the ability to take the place of every symbol on your reels, apart from Free Spins and the Mini-Game, to try and spin you in a seven-ly win.

Not only could a Wild symbol turn a losing spin into a winning one, but it could also increase a winning spin. For example, if you were to spin in 3 Gold Seven symbols in a row, on a win line, then this would already be a golden win. If there was a Wild symbol next to them though, it would act as a 4^th Gold Seven symbol to bring you a x85 multiplier prize!

The Wild symbol is sent from the sevens, however it does have its limitations. The Wild is unable to spin you in the progressive Mega Jackpot. To be crowned with that prize, you’ll need to spin in all 5 Jackpot symbols on a win line.

Free Spins

You could soon be in seventh heaven if you see 3, 4 or 5 Free Spins symbols appear in any order on an active win line, as you’ll have just unlocked 5, 7 or 9 free spins respectively.

These spins are locked to your last paid for bet amount, but don’t worry, you won’t be charged from your in-game credit – they’re on the house!

Once you’ve used up all of your free spins, you’ll head back to the main reels with any winnings having already been added to your on-screen credit.

Progressive Mega Jackpot

Payout Information and Game Rules

Mystery 7s online slots has a theoretical return to player of 94.02%. This is based on long term playback. System malfunctions void all payments. Monies are staked in the following order: winnings, player deposits, bonus credit.

Bonus Boss general terms and conditions apply.