The classic slot pays along fixed paylines: a set of paths drawn across the reels, with matching symbols required along one of them. That format dominated for decades and is still common. But over the past fifteen years, developers have introduced grid mechanics that abandon paylines altogether — ways-to-win, Megaways, cluster pays and scatter pays — each changing how players form wins and how the game feels. This guide explains each format and, crucially, what none of them change.
Fixed paylines
The traditional format. A five-reel, three-row grid might have 10, 20, 25 or 40 paylines, each a specific path from the left-most reel to the right. You win when identical symbols land on consecutive reels from the left along an active line. Older games let you choose how many lines to activate; most modern ones have all lines fixed and adjust the total stake instead.
Paytables list the value of three, four and five of each symbol. Players add wins from different lines in the same spin together.
Ways-to-win (243 ways, 1,024 ways)
Rather than lines, the game pays for matching symbols on adjacent reels from the left, in any row position. On a 5×3 grid there are 3×3×3×3×3 = 243 possible ways; on a 5×4 grid, 1,024. You do not need symbols to line up; they only need to be present somewhere on each successive reel.
Ways-to-win games charge a fixed stake regardless of the number of ways. Because there are more ways to form a combination, individual wins are usually smaller than in a payline game with the same RTP — the return is spread across more, smaller events.
Megaways
A licensed mechanic developed by one studio and used under licence by many. The defining feature is that the number of symbols on each reel changes with every spin — typically between two and seven. With six reels, that produces up to 7⁶ = 117,649 ways to win on a single spin, and a different number on the next.
Megaways games almost always include cascading reels (winning symbols removed, new ones fall in) and, in the bonus round, an unlimited multiplier that rises by one with each cascade. The combination of variable reels, cascades and rising multipliers makes these games among the most volatile in the market. Base game wins are often small and frequent; the RTP is heavily concentrated in the free spins feature.
Cluster pays
No reels or lines in the traditional sense. The grid — often 7×7 or larger — fills with symbols, and a win is formed by a cluster of a minimum number of identical symbols (usually five or more) touching horizontally or vertically anywhere on the grid. Winning clusters are removed and new symbols drop in, allowing chain reactions across the whole board.
Cluster games often have features that target specific areas of the grid, such as removing all symbols of one type or charging a meter to trigger a feature.
Scatter pays (“pay anywhere”)
A further simplification: a set number of matching symbols anywhere on the grid, regardless of position or adjacency, forms a win. A 6×5 grid with eight or more matching symbols in any position pays out. These games typically use cascading reels and multiplier symbols that combine at the end of a cascade sequence.
Comparison of formats
| Format | How a win forms | Typical grid | Typical volatility | Characteristic feel |
| Fixed paylines | Symbols along a defined line | 5×3 | Any | Predictable, classic |
| Ways-to-win | Adjacent reels, any row | 5×3 or 5×4 | Medium | Frequent small wins |
| Megaways | Adjacent reels, variable heights | 6 reels × 2–7 rows | High | Chaotic base game; feature-driven |
| Cluster pays | Groups touching on a grid | 7×7 to 8×8 | Medium–high | Chain reactions |
| Scatter pays | Count of symbols anywhere | 6×5 | High | Big multiplier events |
What the format changes
The grid mechanic determines the texture of play: how frequently wins occur, how large they tend to be, how much happens on screen per spin, and how the bonus round is structured. A Megaways game with 117,649 ways feels nothing like a 10-line game.
What the format does not change
The relationship between stake and long-run return is fixed by RTP and volatility, both of which the developer sets independently of the grid format. A 117,649-way game at 96% RTP returns exactly the same amount over millions of spins as a 10-payline game at 96%. “More ways to win” is a description of how wins are formed, not a statement that wins are more likely to exceed stakes. Every additional way to win is matched by a corresponding adjustment to symbol values or frequencies to hold the RTP at its target.
The formats also do not change the fundamental independence of spins. A cascade that runs six deep is not more likely to be followed by another; each new symbol drop is a fresh random event.
Practical points
- High-volatility formats (Megaways, scatter pays) need a larger session bankroll relative to stake to have a reasonable chance of reaching the feature.
- Check the max win figure. Some grid formats cap wins at 5,000× or 10,000× stake; others go far higher, and the higher the cap, the more of the RTP is typically locked in rare events.
- In ways and cluster games, individual base-game wins frequently return less than the stake. The on-screen celebration is not a reliable guide to whether the balance is rising.
Related reading on site: Slot Guide; “Slot Themes That UK Players Love”.
More ways to win also means more ways to lose. Set a session budget before you spin.
