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Big Thunder King Strike

Is there a storm heading this way? Maybe not but Big Thunder, a jungle-themed video slot from veteran game provider Ainsworth that is sure to hit our screens with a big flash. It comes with in-game multipliers, a free spins round and an extra reel with the King Strike Bonus that will award win multipliers or one of the four fixed jackpots.

Slot Details

Big Thunder is a video slot with five reels, three rows, and 30 variable pay lines, plus a sixth bonus reel. Your jungle quest starts at 0.30 credits and peaks at 100 credits. The low-to-medium variance game has a below average RTP of 94.38% but still within the industry range.

Graphics and Visuals

A lush rainforest scene is the backdrop to a semi-translucent game window that is ornamented by lianas and holds on top the four displays for the fixed jackpots. The wild gorilla will go into a rage when landing in a winning combination. Other than that, the soundtrack is pretty much limited to the usual reel and win count noises.

Pay Symbols

You will find card royals from 9 to As at the low end, the latter paying a rather modest 2.5x your stake for lining up a 5OAK win. They are followed by a tribal mask, a warrior shield with spears, and a snake. A tile depicting a waterfall in a rainforest is the top paying symbol with 6.66 times the bet for a five of a kind. The gorilla is the wild symbol which has no pay value in the base game but changes to become the top symbol in the free spins with 66.66x your stake. Scatters are the Big Thunder logo with minimum three needed to trigger the free spins.

The sixth reel has one symbol position in the base game, containing only crowns and empty spaces while in the free spins it has multipliers of x 3 and x5, as well as the Big Thunder scatter.

Bonus Reel Free Spins Feature

Hit three to five scatters to trigger 15 free spins, plus coin wins from 2x to 50x the total stake. Five extra spins are awarded every time minimum three scatters land on a free spin. All low-value symbols are removed from the reels during the feature, providing more potential to score big wins.

Wins are awarded for three to five matching symbols anywhere on a pay line. The pay table is also enhanced with the waterfall symbol increasing from 6.66x to 10x times the bet. The gorilla wild will also award wins, peaking at 66.66x bet for a five of a kind.

During the free spins, the sixth bonus reel will change into a full-size reel, containing x3, x5, and slot logo scatters. All wins are multiplied when one of the two lands in view on the bonus wheel. Hitting five scatters on the reels plus one on the bonus wheel will award a 200x bet win.

King Strike Jackpots

Big Thunder has four fixed jackpots, which are triggered by hitting selected winning combinations with the crown landing on reel six:

  • Major Jackpot – 333.33x bet: winning combo with five of the high-value symbols with no wilds
  • Maxi Jackpot – 83.33x bet: winning combo with five of the low-value symbols with no wilds
  • Minor Jackpot – 33.33x bet: winning combo five of the high-value symbols with wilds
  • Mini Jackpot – 16.66x bet: winning combo with five of the low-value symbols with wilds

Final Verdict

Not a bad slot at all. The base game hits regularly medium wins and surprisingly often the smaller jackpots. However, overall the big money is in the bonus round with the extra multiplier and the enhanced paytable. Well worthy though going on an adventure through the lush jungle.

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