Big Thunder Demo Slot by Ainsworth Free Play

Big Thunder is an online Slot from Ainsworth.

Quick Facts

- Layout: 5 reels x 3 rows (plus 6th bonus reel)

- Paylines: 30 fixed

- Key mechanics: King Strike Jackpots, Free Spins with Multipliers, 6th Bonus Reel

- Special symbols: Gorilla Wild, Big Thunder Scatter, Crown King Strike symbol

How the Game Plays

Big Thunder transports you deep into the heart of a lush tropical rainforest where the silverback gorilla reigns supreme. Developed by Ainsworth, this jungle-themed title features a classic 5x3 grid with an additional independent sixth reel that drives the game's biggest features. Symbols include waterfalls, snakes, and drums, along with standard card royals for lower values. Wins are generated by landing matching icons across the 30 fixed paylines, while the gorilla serves as the wild symbol, appearing stacked on the third, fourth, and fifth reels to assist in forming combinations.

Free Spins Explained

The main bonus is triggered by landing three or more logo scatters, which awards 15 free spins. During this feature, the sixth reel becomes essential as it introduces x3 and x5 multipliers that can apply to any winning combination. Landing additional scatters during the round allows for retriggers, extending the duration of the bonus.

King Strike Jackpots Explained

The standout mechanic of the game is the King Strike feature, offering four fixed jackpot tiers: Mini, Minor, Maxi, and Major. These are won by achieving a five-of-a-kind combination of symbols on the main reels while simultaneously landing the Crown symbol on the sixth reel. The specific jackpot awarded is determined by the symbol type and whether or not the combination included a wild substitute.

Click the Play for Free button to load the Big Thunder demo, test its features and payouts and decide if it is a game you enjoy.