Cluster Pays Cluster Pays
A win system where, instead of paylines, matching symbols must connect horizontally or vertically in groups of a minimum size (usually 5). It is mostly used together with tumble and on large grids.
| English | Cluster Pays |
|---|---|
| Classification | Game Features |
| English | Cluster Pays |
| Category | Game Feature |
| Win condition | Usually 5 or more matching symbols connected horizontally or vertically |
| Grid | Large grids such as 7×7 and 8×8 |
| Features used with it | Tumble, position multipliers, wilds |
| Representative games | Reactoonz, Sugar Rush, Star Clusters |
| Pragmatic Play cluster games on AI Slot | 71 |
Overview
Cluster pays has no fixed lines. You win when matching symbols touch horizontally or vertically to form a group (cluster). Usually 5 or more must be touching to win, and the bigger the cluster, the bigger the payout. In most games, diagonals do not count as touching.
For clusters to form easily, the grid needs to be wide, so large grids like 7×7 and 8×8 are common, and they are almost always paired with tumbling, where winning symbols disappear and new symbols drop in. Of the Pragmatic Play games listed on AI Slot, 71 use cluster pays.
Comparison with other win types
| Method | Win condition | Top games |
|---|---|---|
| Paylines | Same symbol from the left on a fixed line | Book of Dead |
| Ways / Megaways | Same symbol on consecutive reels from the left | Bonanza, Big Bass Megaways |
| Scatter Pays | 8 or more of the same symbol anywhere on screen | Sweet Bonanza, Gates of Olympus |
| Cluster 페이 | 5 or more of the same symbol touching horizontally or vertically | Reactoonz, Sugar Rush |
Top games
Reactoonz (Play’n GO, 2017)
This is the flagship of 7×7 cluster pays. Filling the “Quantum Leap” gauge through chain reactions brings out the giant wild “Gargantoon.” RTP is 96.51% and max win is 4,570x.
Sugar Rush (Pragmatic Play, 2022)
Sugar Rush adds “position multipliers” to a 7×7 cluster grid. A mark is left on the cell where a symbol pops, and when it pops again in the same cell, a multiplier appears and doubles each time. In its sequel, Sugar Rush 1000, the multipliers got even bigger.
Star Clusters (Big Time Gaming, 2020)
This is the first game with BTG’s “Megaclusters” mechanic. Winning symbols split into 4, growing the grid from 4×4 up to 16×16.
Esqueleto Explosivo 3 (Thunderkick, 2024)
It combines 5×5 cluster pays with tumbling and a Muchos multiplier that doubles each time. Max win is 7,500x.
Nolimit City’s xCluster
Nolimit City created the “xCluster” mechanic: if 2 or more different clusters form in a single chain, the multiplier goes up by +1 per cluster starting from the second.
How it feels
Cluster pays games often show small clusters hitting frequently with chain reactions continuing. Because the grid is wide and chains and multipliers overlap, many of these games have a structure where even small base wins can turn into big wins once multipliers stack up.
