Skeleton Key

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Rules and Gameplay

Skeleton Key slot, designed by IGT, opens up with a conventional 5×3 reel layout but quickly diverges with the innovative Reel Expansion feature, elevating gameplay to a thrilling new level. Initially offering 243 ways to win, this number can skyrocket to a staggering 7,776 as the reels expand. Players adjust their bets from $0.10 to $300 per spin, catering to a wide range of gambling enthusiasts. The game’s high volatility and RTP ranging between 92.43% and 96.49% suggest that patience might reward players with substantial payouts. Autoplay options enhance the gaming experience, allowing for uninterrupted spins.

Bonus Features

Skeleton Key is brimming with captivating bonus features that significantly enhance winning potentials:

  • Reel Expansion Feature: Triggered by landing a skeleton key symbol, this feature expands the reels up to 6 rows high, momentarily increasing the ways to win up to 7,776.
  • Mystery Symbol Feature: Mystery symbols (?), upon landing, transform into a single symbol type, potentially leading to lucrative payouts.
  • Free Spins Bonus Feature: Landing 3 or more padlock symbols triggers up to 30 free spins. During these spins, every skeleton key symbol that appears increases the multiplier, enhancing the potential for massive wins.


The enchanting world of Skeleton Key is filled with symbols designed to immerse players in a mysterious adventure:

  • Standard Symbols: Ranging from A to J royals, alongside gemstones and thematic objects such as spellbooks and cups.
  • High-Value Symbols: The treasure chest symbol stands out, offering substantial payouts.
  • Special Symbols: Wilds substitute for other symbols to form winning combinations, skeleton keys trigger reel expansions, and mystery symbols, which transform to increase winning chances.


Skeleton Key’s payout structure is designed to reward players handsomely, particularly through its bonus features. The base game itself offers a respectable payout potential, with the possibility of achieving up to 50x your stake for lining up the highest-value symbols. However, the real treasure lies within the Reel Expansion feature and the free spins, where the game’s mechanics can propel the maximum win to an astonishing 83,333x your stake, especially with the increasing multipliers in play during the free spins.


Starting with 243 ways to win, the innovative gameplay mechanics of Skeleton Key allow this number to expand dramatically. The Reel Expansion feature can increase the number of active paylines up to 7,776, offering players a multitude of winning opportunities. This dynamic approach to paylines ensures that each spin can bring unexpected and exciting results, making every moment in the game a thrilling experience.

Pros & Cons

Pros Cons
Expansive Reel Expansion feature increases ways to win up to 7,776. High volatility may not suit all players.
Impressive maximum win potential of up to 83,333x your stake. Max wins primarily achievable in the free spins feature.
Available on mobile and desktop platforms. RTP varies between 92.43% and 96.49%, which might confuse some players.

Minimum and Maximum Bet

The Skeleton Key slot caters to a wide range of players, with the minimum bet set at $0.10 and the maximum reaching $300. This betting range makes it accessible to both casual players looking to enjoy the game for fun and high rollers seeking the thrill of big bets.

Game Jackpot

The jackpot in Skeleton Key can reach up to an astounding 83,333x the player’s stake, presenting an exciting prospect for players. The game operates with a RTP of 96.49% and falls into the medium to high volatility category, indicating that while wins may be less frequent, they have the potential to be significantly larger, especially when leveraging the game’s bonus features.

About Provider

IGT, short for International Game Technology, stands as the illustrious developer behind Skeleton Key. Founded in 1951, IGT initially carved its niche in land-based slot machines before seamlessly transitioning into the online gaming domain. Renowned for their innovative features and high-quality graphics, IGT ensures a secure and fair gaming experience across all their titles, cementing their reputation as a leading provider in the casino industry.

How To Play

  1. Adjust your total bet using the “+” and “-” buttons to set your desired wager between $0.10 and $300.
  2. View the game rules and paytable for detailed information on payouts, symbols, and bonus features.
  3. Utilize the autoplay feature to set between 10 and 50 spins, customizing stop limits for wins and losses according to your preference.
  4. Hit the spin button to start the game. Keep an eye on the Reel Expansion feature and mystery symbols for increased winning chances.
  5. Trigger the Free Spins Bonus feature by landing three or more padlock symbols. Use skeleton keys to increase the multiplier during free spins.


Skeleton Key emerges as a thrilling adventure into the world of slots, courtesy of IGT’s exceptional craftsmanship. Its unique Reel Expansion feature, substantial win potential, and engaging theme offer a memorable gaming experience. While the high volatility and RTP variation may deter some, the slot’s expansive bet range and exciting bonus features make it a must-try. Whether you’re a novice or a seasoned player, Skeleton Key promises an exhilarating quest for hidden treasures.