Cluster pays
Cluster pays is a slot win system in which matching symbols pay when enough of them touch each other horizontally or vertically on a grid, instead of lining up along paylines. On a typical 7 × 7 cluster slot, a group of five or more identical symbols connected side by side forms a winning cluster, and bigger groups pay more.
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Key takeaways
- A cluster is a group of identical symbols joined edge to edge; diagonal contact usually does not count.
- Each game sets a minimum cluster size, commonly 5, and pays more as the group grows.
- Winning clusters normally disappear and are replaced, so one spin can pay several times.
- Pay anywhere is different: symbols there need not touch at all.
- Pays on
- Touching groups of matching symbols
- Adjacency
- Horizontal and vertical (usually)
- Common minimum
- 5 symbols
- Typical grids
- 5×5, 7×7, 8×8
- Usually paired with
- Cascades and grid modifiers
What cluster pays means
Cluster pays slots throw away the reel-by-reel logic of paylines and ways to win. The screen is treated as a grid of cells. After the symbols land, the game looks for groups of the same symbol that share an edge with at least one other member of the group. If a group reaches the minimum size printed in the rules, it pays according to how many symbols it contains.
Because position on the grid matters only in relation to neighbouring symbols, a cluster can snake across the screen in any shape: an L, a block, a line, or something irregular. Direction does not matter and there is no requirement to start at the left. That freedom makes cluster games look busy and colourful, and it is why so many of them use candy, gems, jars or creatures as symbols. Our hub of cluster pays slots gathers the main titles.
How to count a cluster pays win
Suppose a game pays 0.5x your total bet for a 5-symbol cluster of red gems, 2x for an 8-symbol cluster and 10x for 12 or more. You are betting 50p.
- Find a symbol that appears several times close together, say red gems near the centre of the grid.
- Start with one gem and trace every red gem that touches it on the left, right, top or bottom.
- Keep tracing from each new gem until no more connect. Ignore gems that touch only at a corner.
- Count the group. If it reaches 8, look up the 8-symbol value: 2x total bet, which is £1 at 50p.
- Watch the cascade. The cluster vanishes, new symbols drop, and any new cluster pays on top, for example a 5-cluster adding 25p for a total of £1.25.
Some games use different shapes. Honey Rush plays on a hexagonal grid of 37 cells, where each cell has six neighbours rather than four, so clusters form more easily and the paytable is set accordingly. The rules screen always shows what counts as adjacent.
Cluster pays slots compared
Grid size and minimum cluster size set the rhythm of each game. A small grid with a low minimum produces frequent wins; a large grid with a high minimum relies more on cascades and modifiers to build value.
| Slot | Grid | Minimum cluster | RTP | Volatility | Max win |
|---|---|---|---|---|---|
| Reactoonz | 7 × 7 | 5 | 96.51% | High | 4,570x |
| Jammin’ Jars | 8 × 8 | 5 | 96.83% | High | 20,000x |
| Sugar Rush | 7 × 7 | 5 | 96.50% | High | 5,000x |
| Gemix | 7 × 7 | 5 | 96.83% (lower versions exist) | Medium | Not published here |
| Rich Wilde and the Tome of Madness | 5 × 5 | 4 | 96.59% (top version) | High | 2,000x |
| Aloha! Cluster Pays | 6 × 5 | 9 | 96.42% (top version) | Not published here | Not published here |
| Honey Rush | 37-cell hexagon | 5 | 96.5% (lower versions exist) | High | 9,000x |
Most cluster games are high volatility. Long sequences of cascades, growing multipliers and grid-clearing features carry a big share of the return, while single small clusters in the base game often pay less than the stake.
Why cascades and cluster pays go together
Nearly every cluster pays slot uses cascading reels, also called tumbles or avalanches. After a cluster pays, its symbols are removed and the gaps fill from above. This can create a fresh cluster, which pays and cascades again, so one spin can produce a chain of wins. Many games attach extras to that chain: Reactoonz charges a meter that releases grid-changing characters, and Sugar Rush places multiplier spots where symbols have exploded.
The chain is still decided by random draws and follows the same maths as everything else in the game, so a long cascade does not mean the slot is due to cool down or heat up. In the UK, the whole sequence must fit within the rules on spin speed, with at least 2.5 seconds per spin. Our guide on how cascading reels work covers the mechanics in more depth.
Cluster pays versus pay anywhere
Cluster pays is often confused with pay anywhere, sometimes called scatter pays. The difference is simple: in a cluster game the matching symbols must touch, while in a pay anywhere game they only need to appear in sufficient numbers anywhere on the screen.
| Cluster pays | Pay anywhere | |
|---|---|---|
| Symbols must touch? | Yes, edge to edge | No |
| Typical minimum | 5 symbols | 8 symbols |
| Example | Sugar Rush (5+ connected) | Sweet Bonanza (8+ anywhere) |
| Cascades | Almost always | Usually |
Both systems sit in the same broad RTP range as line slots; neither is inherently better value. Our pay anywhere slots page covers the second type.
Terms related to cluster pays
The closest relatives are cascading reels, multipliers that grow during a chain, and variance, which tends to be high on grid games. For a full walkthrough with example grids, read how cluster pays works.
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Frequently asked questions
What does cluster pays mean in slots?
Cluster pays means the slot rewards groups of identical symbols that touch each other on a grid, rather than symbols lined up on paylines. Each game sets a minimum group size, often five, and a cluster pays more the bigger it gets. Symbols usually need to share an edge, so diagonal contact does not count. After paying, the cluster normally disappears and new symbols fall into place, which can create further wins. Our guide to how cluster pays works walks through example grids.
Do diagonal symbols count in a cluster?
On most cluster pays slots, no. Symbols must connect horizontally or vertically, sharing a full edge with another symbol in the group, and corner-to-corner contact does not join them. Hexagonal games such as Honey Rush are an exception in shape rather than principle: each cell has six edge-sharing neighbours, so clusters can grow in more directions. The game’s rules screen always explains adjacency, often with a diagram. If you are unsure whether a group paid correctly, check the round in your slot game history.
Are cluster pays slots high volatility?
Most are. Cluster games tend to pay small amounts for minimum-size clusters, often less than the stake, and save much of their return for long cascade chains, growing multipliers and grid-changing features. That concentrates value in rarer spins and makes sessions swing more. There are exceptions, such as Gemix, which is published as medium volatility. Always check the volatility label in the rules before playing, and size your stake for a bumpy ride. Our variance entry explains what that means for a budget.
What is the difference between cluster pays and pay anywhere?
In cluster pays, matching symbols must touch each other to form a winning group. In pay anywhere, also called scatter pays, they only need to land in sufficient numbers anywhere on the screen. Sugar Rush is a cluster game needing five or more connected symbols, while Sweet Bonanza pays for eight or more matching symbols in any position. Both usually use cascades, and neither system is better value in itself. Our pay anywhere entry explains the second type in more detail.
When did cluster pays slots appear?
Grid-based cluster games became established online in the mid-2010s. Two long-running examples are Play’n GO’s Gemix, released in 2014, and NetEnt’s Aloha! Cluster Pays, released in 2016, which needs nine or more matching symbols to form a cluster. Since then the format has spread across most major studios, often combined with cascades and character-driven features. Rather than worrying about which came first, compare current games on grid size, minimum cluster, RTP and volatility before you play. Our hub of cluster pays slots lists the main titles.
How much does a cluster pay?
It depends on the symbol and the size of the cluster, and each game publishes its own table. Payouts are usually shown as multiples of your total bet in size bands, for example five or six symbols, seven or eight, and so on up to a top band. Small clusters of low symbols often pay a fraction of the stake, while large clusters of premium symbols can pay many times it. Multipliers from features are applied on top. See how to read a slot paytable for a step-by-step method.