Cluster pays and pay-anywhere slots: how grid slots pay

Cluster pays and pay-anywhere slots drop the idea of lines across reels. Instead, they look at the whole grid. In a cluster game, symbols have to touch. In a pay-anywhere game, they only have to be present. Both usually add tumbles, so a single spin can produce a chain of wins. Here is how each one counts, and what it means for your money.

Cluster pays, step by step

1. The grid fills. Common layouts are 6×6, 7×7 or 8×8, though any shape works.
2. The game looks for clusters. A cluster is a group of identical symbols joined edge to edge, horizontally or vertically. Diagonal contact normally does not count.
3. Size sets the prize. The pay table lists a payout for each cluster size, starting at a minimum, often five symbols. Bigger clusters pay more, usually by a steep curve.
4. Wins are removed. The winning symbols disappear.
5. New symbols drop. Symbols above fall into the gaps and new ones fill from the top.
6. Repeat. The grid is checked again. This carries on until a drop produces no new cluster.

NetEnt's Aloha! Cluster Pays, added to its range in 2016, is a well-known example: iGaming Business described a mechanic that let players increase payouts by growing the size of their clusters. See our NetEnt page.

Pay anywhere (scatter pays)

Pay-anywhere games count symbols, not shapes. If the rules say eight or more of a symbol wins, then eight of them scattered across a 6×5 grid pay, whether or not they touch. The pay table lists bands, for example 8 to 9, 10 to 11 and 12 or more, with higher pays for more symbols.

Pragmatic Play's Sweet Bonanza is a well-known example: iGaming Business describes it as a 6×5, pays-anywhere, tumbling slot whose bonus round adds multipliers. See Pragmatic Play.

Tumbles, cascades and avalanches

Whatever the name, the logic is the same: a win clears space, new symbols fill it, and the game checks again. Tumbles matter for two reasons.

• Wins come in chains. One spin can pay three or four times as each drop forms a new group.
• Multipliers often ride on them. Many games raise a multiplier with each tumble in a bonus round, or drop multiplier symbols that apply to the whole chain.

The chain does not change the game's RTP. It is simply how the game delivers it: a lot of small or zero results, and occasional long chains that pay far more.

Hit rate and volatility

Grid games can look busy. Lots of symbols, lots of movement, and often a small win. That busy feel can hide two facts:

• Many wins are smaller than the stake. A minimum cluster on a low-value symbol may pay a fraction of your bet. In Great Britain, a return equal to or less than your stake cannot be shown with win-style sounds or animations (RTS 14F), but elsewhere it may be.
• Much of the RTP sits in the bonus. Rising multipliers in a feature round can produce very large results, which means the base game often returns well below the headline figure.

A hypothetical illustration: a game with a 30% hit rate, where most hits pay 0.2x to 1x, can still be high volatility if a large share of its return comes from rare bonus rounds. Read the volatility rating in the info screen if the studio gives one, and see our RTP and volatility guide.

Myths

• "A full-looking grid means a win is close." Each drop is random. Symbols on screen do not raise the chance of the next one forming a cluster.
• "Tumbles are bonus spins." They are part of the spin you already paid for, not extra value on top of the RTP.
• "More symbols on screen means better odds." The game is balanced around its grid size. A bigger grid does not mean a higher RTP.

Playing cluster and grid slots online

• RTP versions. Many grid slots are sold at several RTP settings, and each casino chooses one. Check the RTP in the game's help screen where you play. Our online slots guide explains why a few points matter.
• Feature buys. Many grid games outside Great Britain let you pay to start the bonus. GB-licensed sites do not offer this: the Gambling Commission had operators remove "feature buy-in" options in 2020 (see bonus buy slots).
• GB rules. In Great Britain each spin must take at least 2.5 seconds and turbo is banned (RTS 14), autoplay is not allowed (RTS 8), and stakes are capped at £5 a spin, or £2 for players aged 18 to 24 (stake limit guidance).
• Demo play. Demos are the easiest way to learn the pay bands and multipliers. They cannot show you how often the bonus lands over thousands of spins.

Where to play

We list licensed casinos only: UK casinos, Ontario casinos, rest of Canada, New Jersey casinos, Pennsylvania casinos and Michigan casinos. See all casino markets. Related: Megaways slots, hold and win slots and progressive jackpot slots.