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Big Thunder slots


Big Thunder is a 5 reels, 30 paylines online video slot that has been brought to you by Microgaming (Ainsworth). This online slot can be played at Aspers Online. Big Thunder Slot is a beautifully designed game with a nature theme, and mainly the imperial looking silverback gorilla. The reels of Big Thunder Slot are set against a rainforest with constricting vines and leaves surrounding it. On this game, you will find the Bonus Reel Feature and the King Strike Bonus.

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Coin values on Big Thunder slot can be selected on the Bet field, and it can be anything between £0.01 to £100 per payline. On each spin, you can select between 1 and 30 lines to be active and this can be opted on the Lines field.


Symbols appearing on the reels of this jackpot slot are the Big Thunder Logo, the Silverback Gorilla, King Strike, a Drum, a Waterfall, a Mask, a Shied, and a Snake. The Gorilla is the Wild Card on Big Thunder Slot, where it replaces all other symbols on the reels to form winning combinations.

The Bonus Reel Feature is activated whenever 3 or more scattered Big Thunder Logo land in any positions on the reels. Here you will be awarded 15 Free Games, where a Bonus reel will appear on the left-hand side, where three additional symbols (Big Thunder, x3 and x5) can appear. More scatters landing on the reels will award you an additional 5 Free Games. The Gorilla symbol acts as the Wild symbol during the Free Games feature. When the 3x or 5x symbol appears in any position on the bonus reel, all your winnings are multiplied by 3x or 5x respectively.

This game also has a King Strike Bonus, offering four jackpots known as Major, Maxi, Minor, and Mini. The jackpots are triggered when:

  • Mini jackpot is initiated when you get a five of a kind Royal symbol with a minimum of one substitute making up the winning combination, and a King Strike symbol appearing on reel 6.
  • Minor jackpot is awarded when you have a 5 of a kind icons with the theme paying symbol, consisting of at least 1 substitute in the winning combination, and a King Strike symbol appearing on reel 6.
  • Maxi jackpot is triggered when you get 5 of a kind of Royal symbol without any substitutes in the winning combination, and the King Strike symbol appearing on reel 6.
  • Major jackpot is activated when you get a 5 of a kind of theme paying symbols with no substitutes, and a King Strike symbol on reel 6.


Did you enjoy your gameplay on Big Thunder Slot?  Play other entertaining jackpot slots at Aspers Casino Online, such as Heidi’s Bier Haus Slot, Lock It Link Nightlife Slot, Diamond Deal Slot, Big Wheel Slot and more.

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