Kings of Crystals

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Rules and Gameplay

Embark on a medieval quest with the Kings of Crystals slot, a game developed by All41 Studios in collaboration with Microgaming. This slot transports players to a fantasy world where the pursuit of colored crystal crowns dominates the narrative. The game unfolds on a 5×4 grid, featuring 40 paylines that can expand under certain conditions, providing a thrilling high-variance play. Players are invited to wager from $0.20 to $20 per spin, making the game accessible to a wide range of budgets. The objective centers around gathering scatter symbols represented by crystal crowns of varying colors to unlock the game’s rich bonus features.

Bonus Features

The Kings of Crystals slot is laden with captivating bonus rounds that significantly enhance the gameplay:

  • Nudging Wilds Bonus Round: Activated by red crystal scatters, this feature rewards players with 5 free spins where wilds can nudge to cover entire reels, set against a 5×6 grid with 100 paylines.
  • Jackpot Bonus Round: Initiated by green crystal scatters, offering 10 free spins and a chance at one of four escalating jackpots through the collection of gold coin symbols.
  • Multiplier Bonus Round: Triggered by blue crystal scatters, this round provides 5 free spins accompanied by a random multiplier, enhancing potential wins.
  • These dynamic rounds can be triggered individually or in combination, directly from the base game, creating a multifaceted gaming experience.

Additionally, players outside the UK have the option to purchase these bonus rounds directly, adding an element of strategy to the game.


The game’s symbols are intricately designed to fit the medieval fantasy theme:

  • High-value Symbols: The trio of kings adorned with crystal crowns in red, blue, and green, with the green king symbol yielding the highest reward of 5x the stake for five matches.
  • Wild Symbol: Appears on the middle reels, substituting for other symbols to aid in forming winning combinations.
  • Scatter Symbols: Colored crystal crowns that play a pivotal role in activating the game’s bonus features.


The Kings of Crystals slot offers a structured payout system:

Symbol 5 of a Kind 4 of a Kind 3 of a Kind
Green King 5x Not specified Not specified
Premium Symbols 2.5x Not specified Not specified
Wild N/A N/A N/A

This rewarding structure is complemented by the game’s high volatility and the prospect of securing a win up to 10,000x the stake, mainly achievable through the jackpot bonus round.


At its core, Kings of Crystals is structured with 40 paylines on a standard 5×4 grid. However, players can unlock up to 100 paylines in certain bonus rounds, notably the Nudging Wilds Bonus Round. This expansion not only increases the chances of winning but also adds an extra layer of excitement to the gameplay, keeping players engaged as they navigate through the mystical world of Kings of Crystals.

Pros & Cons

Pros Cons
Three distinct bonus rounds for dynamic gameplay Visuals may appear dated to some players
High volatility offering substantial win potential Game complexity might be overwhelming for beginners
Option to purchase bonus rounds (non-UK players) Top-tier jackpot win might seem unrealistic to achieve

Minimum and Maximum Bet

The Kings of Crystals slot caters to a wide range of players with its accessible betting range. The minimum bet starts at $0.20, allowing those with a conservative bankroll to enjoy the game. On the other hand, the maximum bet is set at $20 per spin, which is appealing for players looking to maximize their winning potential. This betting range ensures that the game is inclusive, catering to both casual players and high rollers alike.

Game Jackpot

The Kings of Crystals slot offers a grand jackpot win of up to 10,000x the stake, presenting players with a lucrative target. This slot operates on a high variance model, meaning that wins can be significant but may occur less frequently, aligning with the substantial jackpot on offer. Additionally, the game boasts an RTP (Return to Player) of 96.40%, indicating a fair return over time. The combination of high variance and a solid RTP makes for an exciting, albeit unpredictable, gaming experience.

About Provider

All41 Studios, in partnership with Microgaming, is the developer behind Kings of Crystals. Microgaming is a well-established name in the online gaming industry, known for producing high-quality slots with innovative features and engaging gameplay. All41 Studios, although less well-known, has demonstrated its ability to create captivating games that resonate with players. This collaboration has resulted in a slot game that combines traditional elements with modern bonuses, showcasing the strengths of both providers.

How To Play

  • Start by setting your bet size, with options ranging from $0.20 to $20 per spin.
  • Once your bet is set, initiate a spin to start the game. The objective is to land matching symbols across the paylines.
  • Collect colored crystal crown scatters (red, blue, green) to fill the meters and trigger bonus rounds.
  • Watch for the appearance of wild symbols on reels 2, 3, and 4, which can substitute for other symbols to form winning combinations.
  • Engage in the bonus rounds that each offer unique features such as Nudging Wilds, Multiplier Free Spins, and Jackpot Free Spins for increased win potential.
  • For non-UK players, consider purchasing bonus rounds directly from the in-game menu to instantly access the game’s special features.
  • Keep an eye on the paytable and game rules for detailed information on payouts and the function of each symbol.


Kings of Crystals by All41 Studios and Microgaming is a commendable slot game that offers an engaging medieval fantasy theme, enriched with vivid bonus features and a potential for significant wins. Despite some criticisms regarding its visuals and complexity, the game stands out for its unique approach to bonus rounds and the opportunity to win up to 10,000x the stake. It caters to a broad audience with its flexible betting range and incorporates both traditional and innovative elements to create a rewarding gaming experience. For players seeking a blend of adventure and opportunity, Kings of Crystals is a slot worth exploring.