Introduction
Cluster Tumble is the 5th game in Relax Gaming's Tumble Series, and it continues the story from Temple Tumble. A courageous explorer receives an emergency signal from her missing husband and heads into the Himalayan wilderness of Nepal to rescue him from a mountain temple.
The game plays on a large 8×8 grid using cluster pays. To reach the free spins, you can clear every stone block from the grid, or simply land 3 scatters. Along the way, special power-up blocks can add Wilds, Lightning Wins, and Fire Transforms.
This guide explains how to play Cluster Tumble, how the blocks and free spins work, and what the RTP and 20,000x max win mean.
Cluster Tumble at a Glance
Specification | Details | Source |
|---|---|---|
Game | Cluster Tumble | Official |
Provider | Relax Gaming (in-house) | Official |
Series | Tumble Series (5th game) | Official |
Grid | 8 × 8 | Official |
Win System | Cluster pays (4+ matching symbols, reported) | Official / Third-party |
Min / Max Bet | $0.10 / $50 | Official |
Volatility | High | Official |
Max Win | 20,000x the bet | Official |
Free Spins | 5 to start | Official |
RTP | 96.40% (separate German and UK versions listed) | Third-party / Official |
Bonus Buy RTP | 96.48% (standard) / 96.57% (Volatile) | Third-party |
Hit Frequency | About 1 in 5 spins | Third-party |
Relax Gaming lists bets in euros; they're shown here in dollars. RTP versions and bet limits can vary by casino, so always check the in-game info screen.
What Is Cluster Tumble?
Cluster Tumble is an in-house Relax Gaming slot and part of its Tumble Series, which shares a core idea: a grid full of stone blocks that you break open with tumbling wins. If you've played Temple Tumble, the story picks up from there, deep in the Himalayas. Other games in the same style include TNT Tumble, with its mining theme, and Torii Tumble, set in feudal Japan.
What makes Cluster Tumble different is the cluster pays system on a big 8×8 grid. Only some positions hold symbols at the start; the rest are filled with stone that you clear as you win. Relax Gaming describes the game as highly volatile, with a 20,000x max win.
How to Play Cluster Tumble
Open the game in demo mode or at a casino that offers it.
Set your bet. Relax Gaming's range is $0.10 to $50 per spin, though casinos may set their own limits.
Spin the 8×8 grid. Symbols fill the open positions; the rest are stone blocks.
Form clusters of matching symbols that touch horizontally or vertically.
Watch the tumbles. Winning clusters disappear, new symbols drop in, and nearby stone blocks are destroyed.
Clear all the stone, or land 3 scatters, to trigger the free spins.
Check the info screen for cluster sizes, symbol values, and your casino's RTP version.
Our guide to reading a game's info screen before your first spin explains what to look for.
Cluster Tumble Features Explained
Cluster Pays
Instead of paylines, you win by forming clusters of matching symbols that touch each other horizontally or vertically. Reviews say a cluster needs at least 4 matching symbols. Bigger clusters pay more. For a full explanation, read our guide to what cluster pay slots are.
Cluster pays are similar to the pay-anywhere system in Leprechaun Heist. The difference is that in Cluster Tumble, the matching symbols have to touch.
Tumbling Wins and Stone Blocks
After each win, the winning symbols are removed and new ones fall in. According to Relax Gaming, wins must be formed to destroy the surrounding blocks, so every winning cluster opens up more of the grid. Reviews say there are 64 positions to clear in total.
For how tumbling compares with standard reels, see our guide to cascading reels vs traditional slots.
Power-Up Blocks
Some stone blocks contain special features. Relax Gaming confirms three types, which activate when a win lands next to them:
Power-Up Block | What It Does (Per Reviews) |
|---|---|
Wild | Adds a Wild to the grid; reviews say Wilds can have up to 5 "lives" |
Lightning Win | Picks a target symbol; in the next tumble, every matching symbol (plus Wilds) wins wherever it is on the grid, with no cluster needed |
Fire Transform | Picks a target symbol; in the next tumble, 1–2 other symbol types turn into that symbol, helping build clusters |
These blocks give the base game extra variety between free spins. For more on how features like this work, see how social casino game mechanics work.
Free Spins
There are two ways to reach the free spins:
Clear the grid: remove every stone block in the base game.
Land 3 scatters: this triggers the round directly.
Either way, you get 5 free spins. According to reviews, the round then works like this:
Clearing the grid again awards +3 free spins and raises the multiplier by +3.
The multiplier keeps growing by +3 each time you clear the grid, and stays in place for the rest of the round.
Each scatter that lands during free spins adds 1 more spin.
For a general primer on bonus rounds, see how free spins work.
Bonus Buy and Volatile Free Spins
Where local rules allow it, reviews describe two buy options:
Option | Cost | What You Get | Reported RTP |
|---|---|---|---|
Free Spins | 100x the bet | 5 free spins, multiplier rising +3 per clear | 96.48% |
Volatile Free Spins | 200x the bet | 5 free spins, multiplier rising +6 per clear | 96.57% |
As with Royal Potato, buying the bonus slightly raises the RTP, but it costs a large multiple of your stake and doesn't guarantee a return. Bonus buys aren't available in some markets, including the UK. Chasing bonus buys is one of the common mistakes new players should avoid.
Cluster Tumble RTP, Volatility and Max Win
RTP: 96.40%. Review sites list 96.40% for the standard version. Relax Gaming also lists a 90% version for Germany and a separate UK version, so check the info screen at your casino. RTP is a theoretical long-term average and doesn't predict any session.
Volatility: High. Relax Gaming calls this a highly volatile game. Reviews put the hit rate at about 1 in 5 spins, and note that base game wins tend to be small until the free spins multiplier gets going. See what slot volatility means and our guide to volatility vs RTP.
Max win: 20,000x the bet, according to Relax Gaming. Reviews add that if a round's total reaches 20,000x, the round ends at that amount. Wins near the cap are extremely rare; our guide to understanding social casino game odds explains why.
Is There a Cluster Tumble Demo?
Yes. Relax Gaming's official page has a Try Game demo, available after you confirm you're 18 or over. It's a good way to see how the stone blocks and power-ups work before you play for real.
You can also play the earlier Tumble Series game Temple Tumble at SpinSaga with free Gold Coins.
Cluster Tumble vs Other Tumble Series Games
Feature | Cluster Tumble | TNT Tumble | Torii Tumble |
|---|---|---|---|
Grid | 8×8 | 5×7 | 6×6 |
Win System | Cluster pays | 3+ in a straight line | Up to 46,656 ways |
Special Features | Wild, Lightning, and Fire blocks | TNT, Drill Wilds | Multiplier Ladder, stone blocks |
Free Spins | 5, multiplier +3 per grid clear | 6, choice of 3 modes | 8, choice of 3 modes |
Max Win | 20,000x | 12,278x | 20,000x |
Who Might Enjoy Cluster Tumble?
Cluster fans: players who like cluster pays on a big grid.
Goal-driven players: players who enjoy a clear target, such as clearing every stone block.
Multiplier fans: players who like free spins with a multiplier that keeps growing.
Story fans: fans of Relax Gaming's Tumble Series and its continuing adventure.
For another Relax Gaming in-house title, try Bill & Coin 2 at SpinSaga, or browse SpinSaga's featured games.
Responsible Play
Every spin is random, and no pattern of play makes a full grid clear more likely. Our guide to how RNG ensures fair gameplay explains why.
Set a time and spending limit before you play; our simple session budget framework can help. New to online slots? Start with our first-time player checklist.
Frequently Asked Questions
What is Cluster Tumble?
A Relax Gaming slot on an 8×8 cluster pays grid, and the 5th game in its Tumble Series.
Who made Cluster Tumble?
Relax Gaming.
What is the Cluster Tumble RTP?
96.40% for the standard version. Versions for Germany and the UK differ.
What is the Cluster Tumble max win?
20,000x the bet, according to Relax Gaming.
Is Cluster Tumble high volatility?
Yes. Relax Gaming describes it as highly volatile.
How do you trigger Cluster Tumble free spins?
Clear every stone block from the grid, or land 3 scatters. Either way, you get 5 free spins.
How does the free spins multiplier work?
Each time you clear the grid during free spins, you get +3 spins and the multiplier rises by +3, according to reviews.
What are power-up blocks?
Special stone blocks that can add Wilds, Lightning Wins, or Fire Transforms when a win lands next to them.
Can you buy the Cluster Tumble bonus?
Yes, where permitted. Reviews list 100x for standard Free Spins and 200x for Volatile Free Spins.
Can I play Cluster Tumble for free?
Yes. Relax Gaming's official page has a demo for players aged 18 or over.
Source: Relax Gaming – Cluster Tumble
