Cluster Tumble (Relax Gaming) Slot Review

Cluster Tumble: Slot Overview 

Relax Gaming’s Cluster Tumble is a high-octane, high-volatility grid slot that blends narrative, visual flair, and powerful features into one of the studio’s most visually compelling offerings. Released on November 3, 2021, this 8×8 cluster pays slot continues the tale from Temple Tumble Megaways, following a bold, tattooed female explorer who ventures deep into the Himalayan wilderness to rescue her missing partner. With the stakes raised both narratively and mathematically, Cluster Tumble invites players to crack open a fortress-like grid filled with blocker tiles, cascading wins, and escalating multipliers. 

Its adventure theme channels strong Lara Croft and Cat Wilde vibes, but Relax adds its signature cinematic polish, setting the tone for a high-risk, high-reward journey that can yield up to 20,000x the bet. The game is also available in a Dream Drop progressive jackpot version, expanding its appeal even further.

Design and Graphics 

Cluster Tumble looks absolutely stunning. Set within a temple nestled in a rugged Himalayan backdrop, the slot evokes a strong sense of place. Pillars and ornate carvings frame the grid, while the heroine—an explorer equipped with a torch—stands ready at the side, adding to the sense of urgency and mission.Each symbol is crafted with attention to detail: there are various crystal symbols, ancient masks, scarabs, and of course, dragons that offer the biggest rewards. Stone tiles (or blockers) clutter the grid at the beginning of each spin, and it’s a visual treat to watch them burst away as wins occur and the board gradually opens up. There’s an atmospheric mix of mystical and adventurous design cues, creating a temple-trek aesthetic reminiscent of ELK Studios’ Katmandu Gold but with Relax’s distinct sharpness and polish.

Gameplay Mechanics 

This is not your typical reel-based slot. Cluster Tumble uses a cluster pays mechanic on an 8×8 grid, where winning combinations form from at least four matching symbols connected horizontally or vertically. What makes it particularly challenging (and rewarding) is the presence of blocker tiles: each round starts with just 15 visible pay symbols, while the rest of the grid is filled with stone blocks that must be broken down through adjacent wins or modifiers. 

The game utilizes a cascade system, meaning symbols involved in wins disappear, and new ones drop in to potentially create further clusters. This leads to exhilarating chain reactions when the grid starts to clear. 

The game’s wild symbols are another standout mechanic. These have up to five lives, meaning they can be used in multiple consecutive wins before vanishing—an ingenious feature that extends winning streaks. The largest dragon cluster, consisting of 40+ connected symbols, pays 2,000x the stake, providing a massive incentive to break through the blockers and build momentum.

Sound and Music 

Relax Gaming has done a terrific job with Cluster Tumble’s sound design. From the moment you load the game, you’re greeted with sweeping, cinematic audio that reinforces the adventurous tone. Each spin and cascade is underscored with tight, punchy effects, and during big wins or bonus triggers, the audio swells into exciting crescendos. 

Ambient sounds of wind, rumbling rocks, and echoing drums deepen the immersive experience. It’s atmospheric without being overwhelming, and when paired with the visual polish, it completes the game’s Indiana Jones-style presentation.

Bonus Features 

Cluster Tumble is packed with features, most of which revolve around the blocker-clearing and cascading wins. Here’s a breakdown of what you can expect:Stone Block Features 

Some blocker tiles contain hidden modifiers, activated by adjacent wins: 

Wild: Spawns a standard wild on the grid. 

Lightning Win: All symbols of the chosen type on the grid automatically form a win. 

Fire Transform: 1–2 random symbols are transformed into a matching type. 

Free Spins 

Triggered by clearing all stone blocks or landing three scatter symbols, players receive 5 free spins. During free spins, clearing all blocks again grants: 

+3 extra spins 

A win multiplier starting at x3, increasing by +3 each full clear 

Scatter symbols add +1 free spin per appearance during the round. Clearing all blockers is challenging, but essential for high multipliers. 

Bonus Buy Options 

For players who want to skip straight to the action:Standard Free Spins: Costs 100x the bet, starts with a x1 multiplier 

Volatile Free Spins: Costs 200x the bet, starts with a x6 multiplier and increases by +6 

These options allow for direct entry into the most rewarding part of the game, though outcomes are still very volatile.

Betting Options and Payouts 

Cluster Tumble caters to a wide range of budgets: 

Min bet: €0.10 

Max bet: €50 

The RTP is as follows: 

Base game: 96.40% 

Standard free spins: 96.47% 

Volatile free spins: 96.57% 

(Note: Dream Drop version has a reduced RTP of 94.0%) 

Volatility is rated at 5/5, making this a high-risk, high-reward game where long dry spells are offset by the potential for 20,000x max win. However, hitting those top payouts is rare, and the game can often frustrate if blockers refuse to break or key multipliers arrive too late during a bonus round.

Conclusion 

Cluster Tumble is a perfect example of what makes Relax Gaming one of the most innovative slot developers today. It brings together a rich narrative, gorgeous visuals, and fresh mechanics into a cohesive and rewarding experience—if you have the patience to handle its volatile nature. 

At first glance, it dazzles with cascades, character, and cinematic flair. But the deeper you go, the more you realize how unforgiving it can be. Blockers, limited initial pay symbols, and the grind to unlock the grid add tension to every spin. But that’s also part of the thrill: clearing the entire board and watching the multiplier rocket upwards is immensely satisfying. 

Ultimately, Cluster Tumble is a must-try for players who appreciate grid slots and are looking for something more immersive than the typical scatter-based formula. It’s not a game for casual spinners looking for steady wins, but for seasoned players who relish challenge and high potential, Cluster Tumble is a temple worth exploring.