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Big Thunder

Big Thunder

Feel the magic of nature on Big Thunder Slot by MicroGaming Systems – Ainsworth. This 5-reel, 30-payline game is playable at King Jack Casino. It is beautifully designed and comes with original features which add more spice to your gaming experience. A lush green scenery is awaiting you!

Special Features of Big Thunder Slot

Wild – Look out for the Giant Gorilla on Big Thunder Slot! It acts as Wild and takes the place of any symbols apart from Scatter to complete winning combinations. It appears only on reels 3, 4 or 5.

Scatter – The Big Thunder Logo is the Scatter symbol which pays in any position. It also helps to trigger free spins.

Free Spins – With 3 or more Scatters anywhere in view, you can enjoy 15 free spins on Big Thunder Slot. Land 3 additional Big Thunder Logos to earn 5 extra spins. Since the Wild Gorilla symbol replaces scatter during this round, triggering extra spins becomes much easier. Here, you can see a 6th reel which multiplies each win by 3x or 5x depending on how it occurs. Plus, wins are paid from right to left and left to right.

King Strike Bonus – Another feature to look out for on Big Thunder Slot is the King Strike Bonus. During this round, you can trigger the 4 available jackpots in the following ways:

        - Major Bonus: Trigger the Major Bonus with 5 high-value symbols in a winning combination, without Wilds but with the Crown on reel 6.

        - Maxi Bonus: Earn the Maxi Bonus with 5 of the low-value symbols in a winning combo, with the Crown on reel 6 but without any Wilds.

        - Minor Bonus: Win the Minor Bonus with 5 high-value symbols along with Wilds in a winning combination, as well as the Crown on reel 6.

        - Mini Bonus: The Mini Bonus is won with five of the high-value symbols and Wilds in a winning combo, along with the Crown on reel 6.


Get the chance to relax in nature on Big Thunder Slot! It is highly entertaining and is set against a lush green backdrop filled with huge green leaves. You can see paper-like reels enclosed within a frame entwined with green vines. The various symbols you can find on them are the Snake, Shield, Waterfall, Mask, Drum, King Strike, King, Queen, Jack, Queen, Nine, Ten and Ace.

Recommended Games

Enjoy nature at its best with similar games to Big Thunder Slot at King Jack Casino. Some of them are Icy Wilds Slot, Ocean Magic Slot, Enchanted Garden Slot or Butterfly Staxx Slot.

How to Play Big Thunder Slot

Click on the Bet tab on Big Thunder Slot to select one of the available bet values ranging from £0.01 to £100.00. You can also activate 1 to 30 paylines. Next, initiate the reels by clicking on the Spin button. Combine at least 3 identical symbols on the reels to win. You can also set several spins to play in an automated manner with the AutoPlay option.


Launch Big Thunder Slot at King Jack Casino while being eligible for fantastic promotions in the future.


Big Thunder Slot is a game which has a lot to offer! For instance, its features are well-thought and rewarding for a minimum wager of 1p. Plus, its lush green design does not let anyone indifferent.

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