Big Time Gaming · High volatility
The slot that invented Megaways. Big Time Gaming's mining classic is still a benchmark off GamStop — here's why.
Updated June 2026 · tested by our review team
Bonanza Megaways (Big Time Gaming, 96.00% RTP, high volatility, 12,000x stake max win) is available off GamStop at non-UK casinos. Read our full verdict, the game's real stats and a breakdown of how its features pay below.
| Developer | Big Time Gaming |
|---|---|
| RTP | 96.00% (single published RTP) |
| Volatility | High |
| Max win | 12,000x stake |
| Reels / layout | 6 reels Megaways + 4-symbol carts, up to 117,649 ways |
| Min / max bet | £0.20 — £20 per spin |
| Features | Unlimited win-multiplier free spins, tumble, reactions |
| Released | 2016 |
Our verdict
Bonanza is the original Megaways slot, and it remains one of the best. The six reels each show a variable number of symbols, with a horizontal cart reel adding extra symbols up top, for up to 117,649 ways to win that change on every spin.
Winning symbols explode and reactions continue while wins keep landing. The free-spins round is the draw: an unlimited progressive win multiplier that climbs by 1x with every reaction, so a long chain can multiply a modest win into something huge. A true high-volatility classic.
High-ceiling games reward patience, not chasing. Whatever you play, set a budget first and stake at a level your bankroll can absorb. New to these sites? Start with our slots not on GamStop guide or our non UK casino reviews.
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FAQ
Yes — Bonanza Megaways is available at casinos licensed outside the UK that are not part of the GamStop network, so a GamStop self-exclusion will not block access. However, if you self-excluded because of gambling harm, we strongly recommend you keep that exclusion and seek support from GamCare rather than seeking out non-UK sites.
The default RTP of Bonanza Megaways is 96.00% (single published RTP). It is always worth checking the game's information panel before you play, as some operators run lower-RTP builds of the same game.
Yes. Bonanza Megaways is a high-volatility slot, so wins are less frequent but can be much larger. It suits players comfortable with longer dry spells in pursuit of the bonus features.
It introduced the Megaways mechanic now used across hundreds of slots. Its standout feature is the unlimited win multiplier in free spins, which increases by one with each successive reaction, so an extended winning chain can build a very large multiplier with no upper limit.