Megaways slots are slot machines where the number of symbols on each reel changes with every spin, which means the number of ways to win changes too. This page explains how that works in practice, covering the variable reel system, the ways-to-win calculation, cascading reels, volatility, and where the format came from. By the end, you’ll know exactly how Megaways slots function and what to expect before you play.
The Variable Reel Mechanic
The thing that makes a Megaways slot different from a standard slot is that the number of symbols on each reel isn’t fixed. On a regular slot, every reel shows the same number of symbol positions on every spin, usually three or four, and the grid never changes shape. On a Megaways slot, the symbol count on each reel is decided fresh at the start of every spin, so the grid looks different from one spin to the next. Everything else about the format builds on this.
The Per-Spin Symbol Count Range
Each reel in a Megaways slot can show between two and seven symbols on any given spin. That range is built into the game engine and can’t be changed by the player. There’s no stake size or setting that affects it. When you hit spin, the engine assigns a symbol count to each reel on its own. What lands on one reel has no effect on what lands on the others. One reel might show three symbols while the one next to it shows six. The next spin could produce something completely different. The two-to-seven range stays the same, but the specific combination shifts constantly.
How Reel Configurations Are Generated
The symbol count on each reel comes from the same random number generator that picks which symbols appear. On every spin, the RNG does two things at once: it decides how many symbol positions each reel will show, and it decides which symbols fill those positions. Because the per-reel count is itself a random output, the total size of the grid changes from spin to spin, and that’s what makes the number of ways to win vary. The player can’t configure, unlock, or change any of this.
The Ways-to-Win Calculation
Megaways slots don’t use fixed paylines. On a standard slot, the number of winning lines is set by the paytable and never changes. Megaways replaces that with a ways-to-win system, where the number of possible winning combinations is recalculated every spin based on how many symbols land on each reel. Because those symbol counts change independently, no two spins necessarily have the same number of active ways.
How the Number of Ways Is Calculated Per Spin
The total ways to win on any spin is the product of the symbol counts across all six reels. The game checks how many symbol positions appear on reel one, then reel two, and so on, then multiplies those numbers together. That result is the number of distinct combinations available on that spin. Say the six reels show 4, 5, 6, 4, 5, and 3 symbols: 4 × 5 × 6 × 4 × 5 × 3 = 7,200 ways to win. If even one reel lands on a different symbol count next spin, the whole calculation starts over.
The Maximum Ways-to-Win Figure
The 117,649 ways figure you see advertised is what you get when every reel simultaneously lands at its maximum of seven symbols. The maths is simple: 7 × 7 × 7 × 7 × 7 × 7, or 7⁶, equals 117,649. That only happens when all six reels hit their maximum at the same time. Any spin where one or more reels land with fewer than seven symbols drops the total below that ceiling, often by a lot.
What Constitutes a Winning Combination
A winning combination forms when matching symbols appear on consecutive reels starting from the leftmost reel, regardless of where those symbols sit vertically. A symbol on the top row of reel one can connect with a symbol on the bottom row of reel two and a middle-row symbol on reel three, as long as the chain runs unbroken from reel one onward. That’s different from fixed-line slots, where matching symbols have to land on a specific predefined pattern to count as a win.
The Cascading Reels Feature
Cascading reels, sometimes called reactions or tumbles, is the second structural feature that defines a Megaways slot. It works alongside the variable reel mechanic, not separately from it. Where the variable reel system controls how many symbols appear on each reel, the cascade mechanic controls what happens to those symbols once a winning combination is found. The two are linked: every cascade step re-engages the variable reel logic on the affected positions.
The Cascade Sequence
Within a single paid spin, the cascade follows a fixed sequence that the game engine runs through in order.
Win evaluation — the engine identifies winning combinations on the spin result.
Symbol removal — symbols that formed part of any winning combination are removed from the reels.
Symbol replacement — new symbols drop into the empty positions from above.
Re-evaluation — the engine checks the new reel state for additional winning combinations.
Sequence termination — the cascade keeps going until a spin result produces no new winning combinations.
Why Cascades Compound the Ways-to-Win Model
The ways-to-win figure isn’t locked in for the duration of a spin. It gets recalculated each time new symbols drop in during a cascade, because the symbol count on each reel can shift when replacements arrive. A spin that started with one ways-to-win total can show a different total at the second cascade step, and a different one again at the third. A single paid spin can produce multiple sequential wins, each evaluated against its own ways-to-win figure. In effect, every cascade is a fresh evaluation under potentially different reel dimensions, not a repeat of the original spin.
The Origin and Licensing of the Engine
The variable-reel mechanic at the centre of this format was created by Big Time Gaming, an Australian slot studio based in Sydney. It’s not a generic industry pattern that any developer can freely copy. Big Time Gaming owns the intellectual property and licenses it to other studios under commercial agreements. Any game carrying the Megaways name, regardless of which studio made it, exists under that licensing arrangement rather than as an independent version of a shared public concept.
The Licensed Engine Model
Big Time Gaming licenses the mechanical engine to third-party studios, which then build their own games on top of it. Each studio supplies its own theme, artwork, symbols, soundtrack, bonus features, and base-game volatility tuning, but the core reel behaviour, the variable symbol count per reel and the resulting ways-to-win calculation, comes from the licensed engine.
The practical result is that a Megaways slot from one studio and a Megaways slot from another share the same underlying maths for how reels populate and how winning ways are counted. The differences between titles are in the presentation and feature design, not in the fundamental probability structure of the reel mechanic. When you compare two Megaways titles, the visible differences don’t extend to the core engine driving the reel outcomes.
The Volatility Profile
Megaways slots sit at the high end of the volatility scale. That’s not a marketing label — it’s a direct result of the mechanics described above: a reel array whose symbol count changes every spin, a ways figure produced by multiplying those counts together, and a cascade sequence that lets a single paid spin resolve into multiple consecutive payouts. Each of these mechanics shifts the payout distribution on its own. Together, they produce a return profile where most spins pay nothing and a small number pay out disproportionately large amounts.
The Win Frequency and Win Size Trade-Off
Winning spins happen less often on a Megaways slot than on a typical low- or medium-volatility three-reel or fixed five-reel game. The hit rate is lower because the variable reel height means many spin outcomes leave reels with too few matching symbols in adjacent positions to form a left-to-right combination. The upper limit on a single paid spin is correspondingly higher. When a paying combination lands on a configuration close to the maximum ways figure, and the cascade sequence then removes those symbols and replaces them with more paying combinations, the compounded payout from one spin can reach a stake multiple that a fixed-ways slot of comparable stake range simply can’t produce in a single round.
Why the Mechanics Produce High Volatility
The high volatility classification comes from how three structural features interact. The variable reel count creates large spin-to-spin variance in the number of ways available, so the probability space for any given spin is constantly shifting. The multiplicative ways calculation amplifies that variance: doubling the symbol count on one reel doubles the ways total, and configurations near the maximum produce payouts that are orders of magnitude larger than configurations near the minimum. The cascade sequence then allows a single initiating combination to chain into further payouts within the same paid spin. The result is a payout distribution with a long upper tail and a low central frequency.
What the Mechanics Mean for Players Evaluating This Format
The defining characteristic of a Megaways slot is the interaction between the variable reel count, the multiplicative ways-to-win calculation, and the cascade sequence. That same interaction produces both the headline maximum-ways figure and the high-volatility profile. Because the engine is licensed, the underlying maths works consistently across titles from many different studios. Check the specific paytable and volatility rating of any individual game before you play, since theme and presentation vary while the engine is shared.
What are Megaways slots?
Megaways slots are a slot format where each reel shows a variable number of symbols per spin, and the total ways to win are calculated by multiplying those per-reel symbol counts together. The result is a ways-to-win structure that changes every spin rather than a fixed grid.
How are the number of ways to win calculated?
The per-reel symbol counts are multiplied across all six reels, as shown in the worked example in the ways-to-win section above. When every reel lands at its maximum of seven symbols, the calculation hits the 117,649 ceiling.
How do cascading reels work in Megaways slots?
Winning symbols are removed and replaced by symbols dropping into the empty positions, following the cascade sequence described earlier. This allows multiple consecutive wins to resolve from a single paid spin, until no further winning combination forms.
Who created the Megaways mechanic?
The mechanic was created by Australian developer Big Time Gaming. Under the licensed-engine model, other studios produce their own Megaways titles using the same underlying maths.
Are Megaways slots high volatility?
Yes. The format is high volatility, for the mechanical reasons covered in the volatility section. The trade-off is that smaller wins happen less often than in low-volatility slots, while larger payouts are concentrated in fewer outcomes.
How do you play a Megaways slot?
Playing a Megaways slot works just like any other — set your stake, hit spin, and the engine handles everything else. The real difference is under the hood, where variable reels and cascading wins create a more unpredictable experience than fixed-reel games can offer. If you want to put that knowledge to use, browsing a list of top Megaways slots is a good next step.
