Skeleton Key

Review, Demo Play, Payout, Free Spins & Bonuses

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  • Great graphics
  • Free spins with multipliers
  • Expanding reels
  • Mystery symbols
  • No jackpot
  • Medium-high volatility requires patience

Skeleton Key is an online slot game from IGT. It has five reels, three rows and 243 ways to win (in the base game) and features including scatters, wilds, mystery symbols, free spins and expanding reels. The game has an RTP of 96 per cent and medium to high volatility.


Skeleton Key starts with a 5x3 reel structure; however, one of the main attractions is the expanding reels, as players have the chance to play on reels up to six symbols high. Players must land winning combinations of matching symbols and there are 243 ways to win on the original reels, increasing to 7,776 ways on the extended reels. The game features 14 symbols, which comprise four card symbols, six picture symbols and four special symbols. The wild subs for all other symbols on the reels, except for the other special symbols; the lock bonus symbol can trigger the free spins when three or more are landed; the mystery symbol transforms into a paying symbol; and the skeleton key can unlock the reels and will expand the reel it lands on.

Fans of IGT slots can play Skeleton Key here at Slots Temple in demo mode. There is no risk of losing real money, as it is completely free to play and the perfect way to get to know a game.

Theme, graphics & soundtrack

Skeleton Key has a mystery/spooky theme and players must find the skeleton key to open the lock and find the gems. The game looks appealing with impressive graphics. The graphics have a comical feel, so the skeleton on the key looks humorous rather than scary. The game has a mysterious and spooky feel, with green fog covering the extra portions of the reels. The game is jam-packed with features, which means the reels are really lively, and there are some interesting and engaging animations. The soundtrack enhances the theme and adds to the gameplay.

Players who enjoy spooky slots might want to try Microgaming’s Immortal Romance slot, which focuses on vampires.

Skeleton Key

Skeleton Key RTP and variance

Skeleton Key has an RTP of 96 per cent and is a medium to high volatility slot game. This means players may have to be patient when waiting for rewards; however, there should be a good range of prizes on offer, including some generous wins.

How to play Skeleton Key

Simply follow the steps below to get started:

1. Players can see some important game information at the side of the screen. The current number of ways to win is shown along with the win, total bet, coin value and balance.

2. Players can adjust their total bet using the - and + buttons.

3. Players can click ‘game rules’ at the top of the screen to view the rules for the game. There are also controls along the top of the game screen to adjust the audio settings and view information such as the paytable.

4. Pressing the autoplay button above the spin button on the right-hand side of the reels brings up a pop-up menu from which players can select the number of spins and stop limits.

5. To adjust their total bet, players can click the coin icon in the settings menu.

6. Once all the game settings have been adjusted, players can press the spin button on the right-hand side of the screen to set the reels in motion. Always remember to play the game responsibly.

Bet sizes & paytable wins

Skeleton Key allows players to bet a minimum of 0.1 and a maximum of 300.

Here are the payouts for matching two, three, four and five symbols in a winning combination:

- Jack = 0, 2, 4, 6
- Queen = 0, 2, 4, 6
- King = 0, 2, 4, 8
- Ace = 0, 2, 4, 8
- Green gem = 0, 2, 6, 10
- Red gem = 0, 2, 6, 10
- Purple gem = 0, 4, 8, 12
- Goblet = 0, 6, 10, 16
- Book = 0, 10, 20, 50
- Chest = 20, 40, 100, 500

During the free spins feature, the key acts as a multiplier. This starts at 1x.

Skeleton Key features

- Free spins

Players can trigger the free spins bonus feature by landing three or more lock symbols anywhere on the reels. Players are awarded 10 free spins for three symbols landed, with each additional lock landed during the winning spin awarding another 10 free spins; for example, you would receive 20 spins for four locks. Extra free spins can also be retriggered by landing two locks during the bonus. To make the round even more exciting, the reel expansion feature can be activated during the free spins bonus. The key acts as the multiplier, starting at 1x and increasing.

- Reel expansion

Landing a skeleton key on any reel will cause the reel to expand to the full six-row height to increase the winning potential. The key will disappear, causing another symbol to drop. The reels decrease in size by one space on each spin until they return to the normal height of three.

- Mystery symbol

Mystery symbols have the ability to transform into one of the paying symbols. If a mystery symbol lands on any spin, all the mystery symbols will transform into the same symbol, increasing the chances of landing a winning combination.

Skeleton Key review: our verdict

Players are in for a treat with Skeleton Key with its impressive graphics and entertaining theme. The game is jam-packed with features; for example, the reels expand pretty frequently, which keeps the game quite lively, and the mystery symbols and the free spins bonus with multipliers keep players entertained. Skeleton Key feels like a high-quality slot and is definitely a game we recommend.


Disclaimer: Skeleton Key trademark / license is owned by IGT. This site is not endorsed by IGT.

* This button takes you to an external third-party partner real money casino website. Although we try and match games with Casinos that have them, we advise that you double-check the slot content on the casino website before making a deposit or signing up.

Slot Data
Slot Name: Skeleton Key
Software: IGT
RTP: 96.00%
Volatility: Medium volatility
Paylines: 243
Reels: 5
Min Bet (all lines covered): £0.10 (GBP)
Max Bet: £300 (GBP)
Top Win: 83333
Features: Wild Symbol , Scatter Symbol , Multiplier , Free Spins , Medium volatility , 5 Reels , 243 Ways , Mystery Symbols , Reel Modifiers
UK Available in GB? Yes. IGT have a UKGC license and are allowed to offer their games at UK licensed casinos.


What is the RTP of Skeleton Key?

Skeleton Key has an RTP of 96 per cent.

How volatile is Skeleton Key?

This is a medium to high volatility game.

What is the maximum win on Skeleton Key?

Skeleton Key offers a maximum win of 83,333x.

Does Skeleton Key have a free spins bonus round?

Yes, the free spins bonus is triggered when players land three lock symbols.

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