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About Skeleton Key

Grim ghouls guard ghastly golds in this grave-ly great game from IGT. The aim of the game, as the name suggests, is to hunt for spooky skeleton keys which will remove up to three rows of ghostly green mist covering the top half of the reels. Landing a Skeleton Key symbol will extend that column, unearthing all the symbols previously covered by the mist – offering some potentially huge numbers of ways to win alongside a Free Spins feature with an increasing win multiplier.

How to Play Skeleton Key

Total Stake
You can use the Plus and Minus buttons on-screen to increase (+) or decrease (-) your bet. The minimum bet for a single spin is £0.10 and the maximum is £300.

Spin
To get started, select your stake amount then click the spin button to play through one full round. Any wins will be added to your cash balance immediately.

Menu
You can find information on paytables and game rules at the top of the screen, alongside the audio options to turn sound on and off.

Skeleton Key Slot Special Features

Reel Expansion

The game begins with three of the six available rows covered in mist, uncovering a Skeleton Key symbol will expand the row in which it appeared vertically. Multiple keys can be landed, with each spin opening up more ways to win. Any revealed columns will remain expanded for the following spin and will decrease in size by one tile each subsequent spin where no keys are uncovered, until the column returns to a height of three tiles.

Free Spins Bonus

Landing three ‘Bonus’ symbols will automatically trigger the Free Spins Bonus feature. This will land you 10 Free Spins with an incremental win multiplier, while landing four or five symbols will bag you 20 and 30 Free Spins respectively. If you happen to spin more bonus symbols during the Free Spins round, these will be added to your spins – allowing you to unlock up to a maximum of 200 Free Spins per bonus.

Mystery Symbol

Mystery Symbols can appear randomly on each spin which will alter all selected tiles to the same symbol – lining these up can result in some big wins.

Slot Boss Review

With its unique feature of individual expanding columns unlocked by keys, IGT has created a fantastic theme throughout this – not only in aesthetics but also in how the game plays. Lining up keys to unlock further sections of the reels certainly draws clever similarities to using the game’s namesake on a real-life treasure chest. We’re big fans of Free Spin bonuses at Slot Boss and Skeleton Key’s combination of an incremental win multiplier on each Free Spin makes this a real winner in our eyes.

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