Megaways is a reel-modifier mechanic that changes how many symbols land on each spin, producing a different number of winning combinations every time. All of the information on this page is drawn from publicly available game specifications, operator-published terms, and established industry knowledge about how the mechanic works. No funded testing or personal play lies behind these assessments. For a broader look at how we compare casino sites, see our main page.
What Megaways is
Megaways is a slot mechanic created by the Australian game studio Big Time Gaming (BTG) and first released commercially in 2016. Unlike a conventional slot where every reel holds a fixed number of symbols, a Megaways reel can display a varying number of symbols on each spin, commonly between two and seven per reel. Because the number of symbols changes with every spin, the total number of ways to win also changes, reaching a theoretical maximum of 117,649 on a six-reel layout when every reel shows seven symbols. BTG licenses the mechanic to other developers, so Megaways slots now come from studios including Blueprint Gaming, Pragmatic Play, Red Tiger, and iSoftBet, among others.
How the Megaways mechanic works
A standard six-reel Megaways grid uses an extra horizontal reel, usually positioned above the main reels, that adds up to one extra symbol to reels two through five. On any given spin, a random number generator determines how many symbols appear on each reel. The game then calculates the total ways to win by multiplying the symbol counts across all active reels: with a six-reel setup and up to seven symbols per reel, the maths gives 7 x 7 x 7 x 7 x 7 x 7, or 117,649 ways. In practice most spins land far fewer ways, and the slot pays left to right on adjacent reels regardless of the symbol’s vertical position, which is the defining difference from fixed payline slots.
Cascading reels and consecutive wins
Every Megaways title pairs the variable-reel mechanic with cascading reels, sometimes called tumbling or avalanche reels. When a winning combination lands, those symbols are removed from the grid and new symbols drop into the empty positions from above. If the new symbols form another winning combination, the cascade repeats. This chain continues until no new wins appear on the grid, and all accumulated wins from a single paid spin are summed and credited together. The cascade mechanic means a single spin can deliver several wins in sequence without requiring an additional wager.
Volatility and return to player
Megaways slots are generally built as high-volatility games, which means wins cluster in bursts separated by longer dry spells. The mathematical design, with tens of thousands of possible win ways per spin, tends to produce frequent small returns punctuated by rare larger hits rather than a steady drip of modest payouts. The return to player (RTP) on Megaways titles typically falls between 95% and 97%, though this varies by title and, crucially, by the operator hosting the game. UK-licensed operators can choose from different RTP configurations offered by the game provider, and the version running on a given site is not always the highest one published. Public game-sheet data puts Bonanza at 96% in its standard configuration and Extra Chilli at 96.82%, but a player should always check the in-game information panel on the specific casino site where they intend to play.
Bonus features in Megaways slots
The most common bonus round in Megaways slots is a free-spins feature triggered by landing three or more scatter symbols anywhere on the reels. Many Megaways titles carry an unlimited win multiplier during free spins, meaning that every cascade during the bonus round increases the multiplier by one with no upper cap. Because cascades reset after every paid spin in the base game, the free-spins multiplier is where the largest potential payouts sit. Some Megaways games add a gamble feature before the free spins begin, giving the player a chance to risk the awarded number of spins for a higher starting total. Other common extras include mystery symbols that transform into matching symbols across the grid, and reaction-based modifiers that remove low-value symbols during bonus play.
Bonus buy features and the UK position
Several Megaways titles include a bonus-buy option, which lets a player purchase direct entry to the free-spins round for a fixed multiple of the base stake, typically between 50x and 100x. These feature-buy buttons are restricted for play under UK Gambling Commission licensing. The UKGC has taken the view that offering a direct payment to bypass the base game raises harm risks, so UK-licensed operators must disable bonus-buy functionality on any slot that carries it. A UK player loading a Megaways title on a UKGC-licensed site will not see a bonus-buy button even if the same game offers it in other jurisdictions. The restriction applies at the operator level, not the game level, and every UK-licensed casino must comply.
Megaways compared to a standard payline slot
A fixed-payline slot awards wins only when matching symbols land on one of the predefined lines, usually 10 to 50 of them, running across the reels in set patterns. A Megaways slot awards a win whenever matching symbols appear on adjacent reels from left to right, in any vertical position. This single difference means a Megaways spin routinely offers thousands of winning paths where a payline slot offers tens. The trade-off is that Megaways games almost always carry higher volatility, and the base-game hit frequency, while variable, tends to produce smaller average wins relative to the stake because the win ways are spread thin across so many possible combinations. Standard payline slots tend to have a narrower and more predictable win distribution, which some players prefer.
Practical tips for playing Megaways slots
- Check the RTP in the game information panel on the specific casino site before playing. The same Megaways title can run at different RTP settings across different operators.
- Expect high variance. Sessions on Megaways slots can go through long stretches with no significant returns, and the cascade mechanic accelerates stake consumption during dry spells.
- Set a session loss limit and a time limit before opening the game. High-volatility slots can burn through a deposit quickly, and the cascade mechanic makes it easy to lose track of how many spins have been played.
- Be aware of the UK stake limits. Players aged 18 to 24 are capped at £2 per spin, and players aged 25 and over are capped at £5 per spin on all online slots, including Megaways titles.
- Do not chase the bonus round. The free-spins feature on a Megaways slot is mathematically built to trigger infrequently, and increasing stake size to reach it faster is a common and costly mistake.
- Treat the game as paid entertainment with a negative expected value over time. No slot, Megaways or otherwise, offers a positive long-term return to the player.
How we rate Megaways slots sites
Our rankings are built from publicly available data: operator licence status on the UKGC register, published game RTP configurations, the presence or absence of responsible-gambling tools, payment-method speed and limits as stated in operator terms, and user feedback from open platforms such as Trustpilot. We do not fund test accounts or place personal wagers to produce these assessments. The full methodology is set out on how we rate.
Where to play
Ready to play? Compare the best UK slots casinos, rated from public data and operator terms, or browse all best UK casinos.
Responsible gambling
Casino games are designed with a built-in house edge, so over time the house wins. Treat any session as paid entertainment, set a deposit limit first, and use the safer-gambling tools every UK-licensed casino provides. GAMSTOP covers every UK site at gamstop.co.uk, and the National Gambling Helpline is 0808 8020 133. You must be 18 or over to play.
Frequently asked questions
What does Megaways mean on a slot machine?
Megaways refers to a reel mechanic, created by Big Time Gaming, where the number of symbols on each reel changes with every spin. Instead of fixed paylines, the game calculates win ways by multiplying the symbol counts across all reels, producing a different number of winning paths on each spin. The name is a licensed trademark and appears only on slots that use the official BTG-licensed engine.
How many ways to win can a Megaways slot have?
The theoretical maximum on the standard six-reel layout is 117,649 ways, achieved when every reel displays seven symbols. Some Megaways variants use different reel configurations that push the total higher: a seven-reel setup can reach 823,543 ways, and a few titles with expanding reels have advertised over one million ways. In practice, most spins land far below the theoretical maximum, and the actual number of ways on any given spin is displayed on screen.
Are Megaways slots more volatile than regular slots?
Almost all Megaways slots are built as high-volatility or very-high-volatility games. The mathematical structure, with its enormous spread of possible win ways per spin, means that small wins appear frequently but large wins are rare. A standard 20-payline slot with medium volatility will typically produce a steadier rhythm of modest returns, whereas a Megaways title can go through extended periods of small or no returns before a bonus round or a multi-cascade chain delivers a larger payout.
Can I buy the bonus round on a Megaways slot in the UK?
No. The UK Gambling Commission requires all UK-licensed operators to disable bonus-buy functionality on slots. While many Megaways titles include a feature-buy option in their game code, the button is removed or deactivated on the version served to UK players. Any site offering a bonus buy on a slot to a UK-based player is either not UKGC-licensed or is in breach of its licence conditions.
What is the return to player on a typical Megaways slot?
Megaways slots generally sit in the 95% to 97% RTP range, though the exact figure depends on both the game title and the operator hosting it. Game providers typically release each title in multiple RTP configurations, and the UK-licensed casino chooses which version to run. The only way to confirm the RTP for the specific game on the specific site is to open the in-game information or help panel, where UKGC rules require the return to player to be clearly displayed.
Which game providers make Megaways slots?
Big Time Gaming created the mechanic and continues to release its own titles, including Bonanza, Extra Chilli, and White Rabbit. Under licence from BTG, several other studios also develop Megaways slots: Blueprint Gaming, Pragmatic Play, Red Tiger, iSoftBet, SG Digital, and NetEnt are among the most widely distributed. A Megaways badge on a slot’s loading screen or title card confirms it runs on the licensed BTG engine, regardless of which studio built the game.
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