Skeleton Key Slot

Skeleton Key Slot
Published Date · Jan. 6, 2021 · Last Updated · Feb. 22, 2024
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Skeleton Key Slot Review

Skeleton Key Slot Overview

Those brave enough to enter a dark cave full of spirits and hunt for the powerful skeleton key have the chance of being rewarded with prizes beyond their wildest dreams. In this mysterious and exciting slot game from IGT, players face the very real potential to win 83,333x their stake. This haunted game is only for those looking for the biggest prizes on the market. Skeleton Key is played on a 5-reel, 3-row grid with 243 pay lines. To win combos, players must match the spectral symbols in matching formations across the board from left to right. Bonus features for Skeleton Key are plentiful and multi-layered. They include expanding reels, which increase the number of pay lines, mystery symbols, a Free Spins round, plus progressive multipliers. Bets for Skeleton Key range from 10p to £300 per spin. The maximum win for this ghostly game is an astonishing 83,333x your stake. Skeleton Key is a medium to high volatility slot game from a spooky underground cave, with a return to player percentage of 96%.

Graphics and Theme

Ghostly treasure troves are nothing new to the thematic world of online slot games. IGT however, have reinvigorated the genre with this latest creation. It’s fun graphics, and simple yet effective visual components are real treat for the player. Skeleton Key’s background is a dark underground space littered with treasure chests, all bearing a skull symbol on them somewhere. The middle of the screen is taken up by the playing reels which are superimposed onto a foreboding looking lake. The board is made up of floating symbols, with the unlocked reels sitting atop the regular playing board, wreathed in wraithlike smoke. The smoke is removed as you unlock these extra reels.  Normal symbols are represented by gold-fringed letters, whiles special symbols take the form of a chalice, gemstones and a padlock bonus symbols. The music is a fast-paced wind instrument piece, designed to build tension in the game.

Skeleton Key Slot Details











83,333 x

Software Provider




Design and Layout

Scatter Symbols Slots, 5 Reel Slots, Wild Symbol


Free Spins, Bonus Round, Multiplier

The main thing that will stick in the mind about this game, as I’m sure you have noticed, is its gigantic winning potential. This makes Skeleton Key worth a few spins on its own, however, with a fun bonus game and an entertaining theme, IGT have given this game more attributes players will be attracted to.  Easy to play, big win potential and fun game mechanics, make Skeleton Key a real winner.


Fun Theme

Great Bonus Features

Big Win Potential


Lots Of Pirate Themed Slots

High Minimum Bet

How To Play Skeleton Key Slot

IGT makes setting up and playing Skeleton Key easy with a range of betting options provided along the bottom of the screen. Using this menu, players can set the bet per spin and win and loss limits. Once these parameters are set, players may spin the reels. This can be done either by using the manual spin button or by setting up automatic spins. To win, players must match symbols across pay lines from left to right.

Skeleton Key Slot Features

The base game of Skeleton Key as you will notice when starting is played on a 5×3 grid.  However, as has been mentioned, there are expanding reels in this game which form the basis for the bonus play. To unlock these supplementary reels, players must land key symbols somewhere on the reels. The expandable bonus reel above the reel on which you land a key will be opened (you will notice that the smoke clears from the corresponding symbols) meaning three more symbols for that reel will be usable, increasing the available pay lines.

After this sequence, the key is then removed from the grid, and new symbols will fill the spaces below. If you expand all the reels, the grid reaches a maximum size of 5×6, giving the player a maximum of 7,776 way to win. However, for each spin which does not land a key, the grid will shrink by one symbol and eventually end up back in its 5×3 format.

Mystery symbols are in play in Skeleton Key and are represented by boxes with question marks on them. These can randomly land on any reel. When they do, they will transform randomly into any type of symbol, meaning they could trigger wins.

Skeleton Key also has an impressive Free Spins round. Players can trigger it by landing three or more of the padlock symbols on the board simultaneously anywhere on the reels. The number of scatters landed translates into the number of free spins which you are awarded to take into this bonus round.

  • 3 scatters = 10 free spins.
  • 4 scatters = 20 free spins.
  • 5 scatters= 30 free spins.

Once within the Free Spins round, you can keep adding to your free spins total by landing additional scatters. Landing 2 scatters adds two free spins to your total. Landing 3,4 or 5 follow the same values as above.

When you are in the Free Spins round, a progressive multiplier will be applied to the wins that you achieve. At the start of the feature, the multiplier is 1x, yet for each skeleton key landed, the multiplier will grow by 1x.  Mystery symbols (the question mark boxes) now also can reveal skeleton keys, giving you a greater chance of increasing your multiplier and the ability to expand the reels.

Wild symbols are also in play and replace any other symbol on the reels bar the scatter to help form more wins.

Play Skeleton Key Demo for Free

If you want the chance to play for free without staking real money, check out the Skeleton Key slot demo in free play! Use mobile-compatible online slot demos as your mobile gaming solution, offering a satisfying free play gaming experience at your fingertips. Treat online slot demos as your gateway to unseen features and content, providing a unique gaming adventure which prepares you for real money gaming.

Skeleton Key Slot on Mobile

Skeleton Key can be played on all mobile platforms and is optimised for Apple and Android software.

Skeleton Key


Matthew Wojciow

Content Writer

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