Cluster Tumble

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Rules and Gameplay

Embark on a thrilling adventure with the Cluster Tumble slot, a game that combines intricate storytelling with innovative gameplay. Set against the backdrop of an Asian fortress, this 8×8 grid slot by Relax Gaming captivates with its Cluster Pays system. Players win by forming clusters of four or more adjacent matching symbols. The game begins with a mix of symbols and stone blocker tiles, with new spaces opening up as you form winning clusters. Cluster Tumble’s high volatility is balanced by a 96.4% RTP, offering a challenging yet rewarding experience for players seeking adventure and big wins.

Bonus Features

Cluster Tumble is rich in bonus features, enhancing gameplay with variety and excitement:

  • Cascading Wins Mechanism: This feature removes winning clusters and adjacent tiles, allowing new symbols to cascade down, potentially creating additional wins.
  • Unique Stone Block Modifiers: Special stone blocks unveil modifiers when adjacent to winning clusters. These include:
    • Wild Modifier: Generates wild symbols for increased winning chances.
    • Lightning Win Modifier: Transforms into a random pay symbol, with all matching symbols generating wins.
    • Fire Transform Modifier: Turns into a random symbol and changes 1 or 2 symbol types in the following cascade.
  • Free Spins Feature: Triggered by either clearing stone blocks or landing scatters, it starts with 5 free spins and an opportunity for more with grid clears.
  • Progressive Multipliers: In free spins, clearing the grid increases a win multiplier, starting from x3 and incrementing with each clear.
  • Bonus Buy Options: For players outside the UK, the game offers a chance to buy into the Free Spins round, with options influencing multipliers and RTP.


Cluster Tumble’s symbols are thoughtfully designed to align with its adventurous theme:

  • Basic Symbols: Comprise colorful gemstones that represent lower-value icons.
  • High-Value Icons: Themed symbols like the pink dragon, blue Aztec chief, and green scarab beetle, with the pink dragon offering the highest payout.
  • Wilds: Represented by ‘W’, these symbols substitute for others in forming winning clusters.
  • Scatters: Key to unlocking the Free Spins feature.
  • Special Feature Blocks: Fire and lightning blocks that trigger additional game features.


The Cluster Tumble slot promises substantial payouts, especially in its bonus rounds:

Cluster Size Minimum Payout (X Stake) Maximum Payout (X Stake)
4-39 Symbols 0.1 50
40+ Symbols 50 2000
Max Win Up to 20,000x the stake

This game, with its medium to high volatility, teases the possibility of large wins, with the highest rewards typically found in the Free Spins feature, thanks to its multipliers.


In Cluster Tumble, traditional paylines are replaced by an innovative Cluster Pays mechanic. Winning combinations are formed by clustering four or more identical symbols either horizontally or vertically. This mechanic adds a dynamic layer to the gameplay, as each spin brings new possibilities for cluster formations and wins.

Pros & Cons

Pros Cons
Engaging adventure theme with high-quality graphics and sound High volatility may not suit all players
Innovative Cluster Pays and Cascading Wins mechanics Clearing the entire grid can be challenging
Potential for high payouts, up to 20,000x the stake Bonus features may be difficult to trigger
Exciting bonus features with multipliers and free spins Bonus Buy feature not available in all regions

Minimum and Maximum Bet

In Cluster Tumble, players have a wide betting range that caters to different types of players. The minimum bet starts as low as $0.10, making it accessible for players who prefer to wager smaller amounts. On the other end, the game accommodates high rollers with a maximum bet limit of $50 per spin. This range ensures that both casual players and those looking to place larger bets can enjoy the game comfortably.

Game Jackpot

While Cluster Tumble does not feature a traditional progressive jackpot, it offers a substantial maximum win potential. Players can win up to 20,000x their stake, which translates to impressive sums, especially for high rollers. The game’s RTP (Return to Player) stands at 96.4%, which is slightly above the industry average, indicating fair play and reasonable return rates. Cluster Tumble is characterized by its high variance, which means while big wins are possible, they may occur less frequently.

About Provider

Relax Gaming, the developer behind Cluster Tumble, is renowned for its innovative and high-quality online casino games. Established in the gaming industry, Relax Gaming has a reputation for creating slots that combine captivating themes, impressive graphics, and engaging gameplay mechanics. Their commitment to excellence and player satisfaction is evident in the detailed design and creative features of Cluster Tumble, making them a respected name in the online gaming world.

How To Play

  1. Choose Your Bet: Start by selecting your bet size. You can adjust the bet amount between $0.10 and $50 to suit your budget.
  2. Understand the Paytable: Familiarize yourself with the game’s paytable to understand the value of each symbol and the bonus features.
  3. Spin the Reels: Once you’re ready, hit the spin button to start the game. The symbols will fall into the 8×8 grid.
  4. Form Winning Clusters: Aim to form clusters of 4 or more matching symbols. Winning clusters will be removed, allowing new symbols to cascade down.
  5. Trigger Bonus Features: Look out for special stone blocks and scatters to activate the game’s bonus features like free spins and multipliers.
  6. Manage Your Bankroll: Keep an eye on your balance and adjust your bets accordingly to ensure a responsible gaming experience.
  7. Enjoy the Game: Remember to enjoy the adventure theme and the excitement of potential big wins in Cluster Tumble.


Cluster Tumble is an exemplary slot game that combines an adventurous theme with innovative gameplay mechanics. The Cluster Pays and Cascading Wins, along with the potential for significant payouts, make it a standout choice for slot enthusiasts. While the high variance and challenging bonus features may not appeal to all players, the game’s engaging theme and the possibility of large rewards keep the gameplay exciting. Relax Gaming’s commitment to quality is evident in Cluster Tumble, making it a must-try for those seeking an immersive and potentially lucrative slot experience.