About Skeleton Key

The Skeleton Key slot is an online slot by IGT which we recommend for all players due to the unique gameplay and easy-to-grasp mechanics. Players can unlock Mystery symbols, expand the reels and play through Free Spins in this game, meaning there is a lot of variety in the bonuses that our players can unlock. In this game, the reels begin at a standard 3x5 size, but players can expand the reels up to 6x5 by landing key symbols on the reels. Each key symbol will expand that reel up to six positions high in size. After each spin, the reel will lose a symbol until reverting to three symbols high. Multiple keys can land at once, which means that multiple reels can expand at once. Mystery symbols that land on the reels can transform all Mystery symbols into one single symbol. There is also the opportunity to land up to 30 Free Spins in-which players can also land win multipliers, which is similar to the bonus in our Megaways slot games.

IGT are one of the top online casino providers on 21.co.uk and this is one of our favourite releases of theirs.

Everything You Need To Know About Skeleton Key

Reels: 5 Reels, 3 Rows - Can expand up to 5x6

Paylines: Varies. Between 243 and 7,776

Slot Theme: Mystery

Maximum Win: 25,000x the player’s stake.

Volatility: High.

Main Bonus Round: Skeleton Key Free Spins

Free Spins?: Yes.

Jackpot?: No.

How To Play Skeleton Key


To set your stake on the Skeleton Key slot, players can click the minus and plus symbol to change the total bet. This will change the coin value, which is multiplied by 10 to calculate a total value.

Before setting your stake, be sure to set up a bankroll alike to those created for the likes of online roulette and online blackjack.


After setting your stake, you need to decide at which pace you wish to play the game. You can play this game at normal speed with the large spin button on the screen’s right-hand side.

Skeleton Key Standard Bonus Features

Free Spins

By landing three or more bonus symbols on the reels during the game’s standard spins section, players will land 10 or more Free Spins. The maximum number of Free Spins is 30, which can be won by landing five or more bonus symbols. During this feature, landing keys on the reels will trigger the Reel Expansion feature and provide players with a 1x multiplier which can be increased during the round. During this bonus, players can also find Mystery symbols which can transform into all symbols (including the key symbol), meaning a massive win multiplier could be paid out.

21.co.uk Review Of Skeleton Key

Skeleton Key is an online slot that forces you to talk about the brilliant bonus features in-game. There are so many features available for players to utilise that they will always be the main talking point of any slot.

Take Time to Think | BeGambleAware.org | 18+

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