Big Time Gaming’s Bonanza (Megaways) Slot Review

Go mining for treasure in the Bonanza (Megaways) online slot – the most popular of Megaways slots by a country mile! This 6 reel slot from Big Time Gaming that's played using the developer's Megaways game engine that offers up to 117,649 winning combinations. It also comes with a free spins feature with expanding multipliers. Play from between 20p and £500 per spin.

Bonanza Theme & Symbols

Visually, Bonanza Megaways is rather well done. The setting is a mine and it has a Wild West theme and set on hills with huts and waterfalls in the backdrop. With the symbols appearing on stone/granite blocks, you’ll see A, K, Q, J, 10 and 9 royals. There’s also a quartet of gemstones. The purple gemstone is by far the highest paying with 2, 3, 4, 5 or 6 on a payline giving you 2, 5, 10, 25 or 50 times your stake respectively.

Above the reels you'll notice a cart that carries 4 symbols on each spin. Each cart adds another symbol to the reel directly below, providing another potential winning opportunity. The sticks of dynamite are the game's wild - they replace all other symbols bar the scatter and appear on the positions above reels 2, 3, 4 and 5.

Bonanza Megaways engine

Bonanza uses the Megaways game engine - each of the 6 reels can feature anything between 2 and 7 symbols so the number of ways to win changes on each spin. If you see 7 symbols on every reel, you will benefit from the maximum number of 117,649 Megaways. Winning combinations are formed when the same symbol lands on adjacent reels – starting from reel 1.

Bonanza Reactions feature

After each winning spin, the successful symbols are blasted away from the reels and replaced by the symbols above. A new payout is made with the new symbols in place. Known as the Reactions feature, these blasts continue until there's no new winning combination on show. This can lead to plenty of consecutive reactions (or wins).

Bonanza Free Spins feature

The letters G, O, L, D are the scatters. Land 4 of them and you'll trigger the Free Spins feature where you’ll be awarded 12 free spins. Any further scatters on the trigger spin will add another 5 free spins to your total. The Reaction feature is in play during the feature meaning more potential spins.

Bonanza comes with an Unlimited Win Multiplier feature - a multiplier is applied to any payout after every successive explosion. It starts at 1x and increases by 1 on each subsequent explosion win. There is no limit to how high the multiplier can increase to.

Look out for the bars of gold which appear in the carts above the reels during the feature. 3 of them will add another 5 free spins to your tally. Four will give you another 10 free spins. Like the multiplier, there’s no limit meaning potentially unlimited free spins.

Bonanza slot closing thoughts

There's plenty of action on offer in Bonanza - the Megaways game engine means there's always something happening. The best winning opportunities will come via the Free Spins feature though where the multipliers can send your wins soaring. You can win up to 10,000 times your stake on every free spin – the Bonanza RTP % is 96% which is good.

Medium to high variance, Bonanza wasn’t the first Megaways online slot but it may well have been as it’s become a cult classic and by far the most popular Megaways game. As a result, it’s become the go-to slot for streamers as they try and win gold.

The design in Bonanza isn’t as sharp as newer Megaways slots like Kingmaker but this adds to the charm and appeal. The fast-paced hillbilly style backing track is an ideal match for the theme. The gameplay offers some great entertainment too. Get lucky with those free spin explosions and there could be a Bonanza of gold hiding inside Mount Cashmore.

Slot Information

  • Game:
    Bonanza Megaways
  • Software:
    Big Time Gaming
  • Type:
    Video Slot
  • Reels:
  • Paylines:
  • Total Coins:
  • Coins Range:
    0.20 to 500.00
  • Jackpot:
  • Bonus Round:
    Yes (3)
  • Free Spins/Multiplier:

Where to Play Big Time Gaming’s Bonanza (Megaways) Slot


up to £100


Extra Spins



T&C Apply

100% up to £100, Not claimable with Skrill, ecoPayz or NETeller, Minimum deposit £20, Maximum bonus £100, Expiry 7 days, Wagering x48. · 20 Extra Spins per day: during 5 days, Expiry 24h, Wagering x48.


up to £300


Free Spins



T&C Apply

18+. Full T&C’s Apply. New players Only. £10 minimum deposit. 40 x wagering applies. Bonus valid for 14 days. 30 Free Spins will be credited per day for 9 days after qualifying deposit/wager is met. Free Spins valid for 72 hours from credit –


Free Spins


up to £300



T&C Apply

18+. New UK customers only. Opt-in required. 30 free spins on Book of Dead game upon registration with NO wagering requirements or deposit required for spins AND 100% deposit bonus up to £300: Min deposit £10 and 30x wagering requirements apply on bonus (game weighting applies). Max bet applies. T’s and c’s apply. Please gamble responsibly,