Published: 29 Jul 2026
Megaways slots have been the dominant slot mechanic in the UK market for almost a decade. What started as a single Big Time Gaming title in 2016 is now a licensed mechanic running across dozens of studios and hundreds of releases. For UK players asking what Megaways slots are, the short answer is: a dynamic slot engine that calculates the number of ways to win on every spin, with cascading wins, free spins rounds usually built around rising multipliers, and a recognisable high-variance profile. This guide explains how Megaways slots work in practice, the typical Megaways RTP, the volatility profile, and the titles worth knowing. Mega Casino is licensed and regulated by the UK Gambling Commission, Licence Number 39326.
The Mechanic in One Paragraph
Megaways is a slot engine in which each reel can show between two and seven symbols on any spin. The number of ways to win is recalculated for every spin based on the symbol count across the reels. At the maximum (seven symbols on each of six reels), that comes out to 117,649 ways to win. Some Megaways adaptations exceed that ceiling: Buffalo King Megaways from Pragmatic Play reaches 200,704 ways. Wins are formed by matching three or more identical symbols from the leftmost reel across consecutive reels, in any position rather than fixed paylines.
Who Invented Megaways and When?
Big Time Gaming, an Australian studio now owned by Evolution, invented the Megaways mechanic in 2016. Bonanza was the first Megaways slot. The mechanic was so successful commercially that BTG began licensing it to other studios from 2018 onward, and the licensee list now includes Pragmatic Play, Blueprint Gaming, Red Tiger, Games Global, ELK Studios, Yggdrasil, and many others. Each licensee builds its own slot using the Megaways engine, which is why titles like Buffalo King Megaways (Pragmatic Play), Fishin' Frenzy Megaways (Blueprint Gaming), and Gonzo's Quest Megaways (Red Tiger / Evolution) all share the dynamic-reel structure but differ significantly in theme, bonus design, and volatility.
How Each Spin Works
Step through a typical spin, and the mechanic becomes clear. The reels stop with variable symbol counts on each column. The ways-to-win figure recalculates based on the product of symbol counts. Winning combinations form when three or more identical symbols appear on consecutive reels from the leftmost reel. The Dual Reaction (or tumble) mechanic then kicks in: winning symbols disappear, and new symbols cascade down into the empty positions. Cascading wins continue until no further matches form. The mechanic is what gives Megaways slots their distinctive rhythm: a single spin can chain into multiple wins as the cascade resolves.
Megaways RTP Explained
Megaways RTP varies by title and by configuration. Most Megaways slots sit between 95 % and 96.5 % on the most common configurations. Several notable exceptions: White Rabbit Megaways from Big Time Gaming runs at 97.77 % RTP, and Madame Mystique Megaways, also from BTG, runs at 98.03 %. These are unusually high for the format. At the other end, some operators run Megaways slots at lower-tier RTP configurations (94 % or even 92 %), which makes the in-game info panel the only reliable source of truth for the actual RTP at this casino.
RTP is the theoretical return over the long term, calculated across millions of simulated spins. It is not a guarantee of any session result. The configuration variability also means a slot's RTP can quietly differ between two operators, which is something experienced UK slot players check rather than assume.
Volatility on Megaways Slots
Most Megaways slots are high-volatility by design. The mechanic relies on bonus rounds delivering the bulk of the variance, which usually means longer dry spells in the base game punctuated by larger payouts during the free spins feature. Players new to Megaways should size their stakes accordingly. A bankroll that runs comfortably on Starburst or Big Bass Bonanza will deplete faster on Bonanza or The Dog House Megaways simply because of the variance profile, not because of any difference in RTP.
Free Spins and Bonus Rounds
Most Megaways bonus rounds use unlimited or rising multipliers. Bonanza's original free spins round set the template: every cascading win during the bonus increases a persistent multiplier with no upper cap, and the multiplier carries across spins until the round ends. Buffalo King Megaways uses random multipliers of 2x, 3x, or 5x on wilds during free spins, and when multiple multiplier wilds contribute to a single win, the multipliers combine. The Dog House Megaways offers a choice between Sticky Wilds and Raining Wilds modes.
The trigger is usually four or more scatter symbols rather than the three required on most non-Megaways slots, because the dynamic grid makes scatter triggers more frequent. Trigger frequency is typically once every 200 to 300 spins on a standard configuration, though this varies by title and by RTP version.
Megaways Slots Worth Knowing at Mega Casino
Several Megaways titles are worth including on any UK player's shortlist. Bonanza by Big Time Gaming is the original, with the unlimited multiplier free spins round that set the template for the format. Buffalo King Megaways by Pragmatic Play takes the ceiling to 200,704 ways and uses combining wild multipliers during free spins. The Dog House Megaways by Pragmatic Play offers the Sticky Wilds versus Raining Wilds choice. Fishin' Frenzy Megaways from Blueprint Gaming adapts the long-running franchise to the Megaways grid, retaining the fisherman-collect mechanic in the bonus round.
Common Questions about Megaways
Are Megaways slots higher RTP than regular slots?
No. The average Megaways RTP sits within the same 95 to 96.5 % band as the rest of the market. A small number of Megaways titles (White Rabbit, Madame Mystique) sit higher, but they are exceptions rather than the norm.
Are Megaways slots more volatile than regular slots?
As a general rule, yes. The format is designed around bonus-driven variance, with most Megaways titles rated medium-high to high volatility on provider scales.
Can I buy the bonus on a Megaways slot in the UK?
No. Bonus Buy features are unavailable to UK players under UK Gambling Commission rules, regardless of the slot's original design. UK players access the free spins round only through natural scatter triggers.
Why do different sites list different RTPs for the same Megaways slot?
Many Megaways slots are available at multiple RTP configurations, and operators choose which to run. The Dog House Megaways, for example, is offered at 96.55 %, 95.53 %, and 94.55 %. The figure shown in the in-game info panel is the one in use at that specific casino.
Responsible Gambling
High-volatility slots reward patience and discipline more than other formats. Set deposit and session limits before opening any Megaways title, and use the reality check tool for on-screen prompts during longer sessions. Help is available at GambleAware and GAMSTOP offers self-exclusion across all UK-licensed operators.
Explore Megaways slot titles at Mega Casino. 18+ | Play Responsibly. Mega Casino is licensed and regulated by the UK Gambling Commission, Licence Number 39326.
