Megaways Explained
How the Megaways mechanic delivers up to 117,649 ways to win — and what to look for.
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What Megaways Is
Megaways is a slot game engine developed by Big Time Gaming (BTG), an Australian studio acquired by Evolution Gaming in 2021. The engine generates a variable number of symbols on each reel for every spin, producing anywhere between 324 and 117,649 ways to win on a standard 6-reel layout.
The first Megaways slot was Dragon Born (2015), but the mechanic broke through with Bonanza (2016) — still one of the most-played Megaways titles in the UK. BTG licenses the engine to other studios, so today Megaways slots exist from Pragmatic Play, Blueprint Gaming, Red Tiger, iSoftBet, Relax Gaming, ReelPlay, and dozens of others. All pay a royalty to BTG and follow the underlying mathematical framework.
How the Mechanic Works
On a standard 5-reel slot, each reel shows three rows of symbols, producing 243 ways to win (3^5 = 243). On a 6-reel Megaways slot, each reel independently shows between 2 and 7 symbols on each spin. The ways to win are calculated by multiplying the symbols on each reel: at maximum (7 symbols on each of 6 reels), this gives 7^6 = 117,649 ways. The variability is what makes the mechanic distinctive — every spin produces a different reel layout and a different number of ways to win.
Many Megaways slots add a cascading reels mechanic on top: winning symbols disappear and new symbols drop in from above, potentially producing further wins on the same spin. Combined with the variable reel structure, this creates the characteristic chaotic energy of a Megaways base game.
Volatility
Megaways slots run high-volatility by design. The variable reel structure produces big swings — long stretches of dead spins punctuated by occasional huge wins, almost always in the bonus round. Bonanza Megaways tops out at 12,000x bet, Sweet Bonanza Megaways at 21,000x bet, Money Train 4 (extreme volatility, not technically Megaways but the same volatility class) at 150,000x bet.
UKGC Restrictions
Many Megaways slots include a "bonus buy" feature in non-UK versions, allowing players to pay 70x–100x bet for instant bonus round entry. UK Megaways slots have these features disabled by UKGC rule, since they were judged to encourage harmful play patterns. You can still trigger the bonus round through normal play. Some Megaways slots are released in modified-RTP "UK-compliant" versions, so verify the displayed RTP on screen before committing to a session.
Recommended Megaways Titles
Start with Bonanza Megaways for the original. Dog House Megaways for a modern Pragmatic take. White Rabbit Megaways for the highest RTP in the category. All are widely available on UK sites — see our Megaways slot sites comparison for where to play.
Related Guides
- Paylines vs Ways to Win — The difference between fixed paylines, ways-to-win and cluster pays.
- Slot Site Deposit Methods — A breakdown of every legal deposit method on UK slot sites in 2026.
- Provably Fair Slots — How RNG certification and provably fair systems prove slots are not rigged.
- Progressive Jackpots Guide — How progressive jackpots work, the maths behind them, and the biggest UK wins.
- Responsible Gambling on Slots — Recognising harm, setting limits, GAMSTOP and where to find support.
- Slot Glossary — every term used in slots, explained in plain English
Frequently Asked Questions
Where can I learn more about how slots work?
Start with our How Slots Work guide for the underlying mechanics, then RTP Explained and Volatility Explained for the two core technical concepts.
Are UK slot sites regulated?
Yes. The UK Gambling Commission regulates every UK-facing gambling product. Licensed operators must follow strict rules on RNG fairness, segregated player funds, affordability checks and responsible gambling tooling.
What is the UK 10x wagering cap?
The UKGC caps slot bonus wagering requirements at 10x. Anything above 10x is non-compliant on UK-licensed sites. Full guide here.
What is the maximum stake on UK slots?
£5 per spin for adults 25+, £2 per spin for 18–24s. Operators verify age at registration and apply the relevant cap.
Can I play UK slots for free?
Yes, most UK slot sites offer demo play on RNG slots without requiring a deposit. Useful for learning a slot before committing real money.
How do I choose a UK slot site?
See our best UK slot sites comparison — scored on bonus EV, library depth, wagering terms, payment, UX and trust.
Are slot outcomes random?
Yes. UK slots run on RNG (random number generator) software, certified by independent testing labs such as eCOGRA. No memory, no patterns, no "hot" or "cold" slots.
Can I self-exclude from UK gambling sites?
Yes — across every UKGC-licensed site simultaneously via GAMSTOP. Free, 6 months to 5 years.
Where do I find UK slot site reviews?
We review every UKGC-licensed operator in our slot sites comparison, with full pros/cons, bonus EV, library data and verdict for each.
Where can I get help if gambling becomes a problem?
Call the National Gambling Helpline 24 hours a day on 0808 8020 133. Online support at BeGambleAware and GamCare.