Big Thunder mobile slot

Come face to face with the biggest beast of the jungle in this chest beating online casino slots adventure

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It's time to get in trouble with Thunder at the Tropics - thanks to Big Thunder!

This awesome game has six reels: five main reels with symbols of different types and one bonus reel with special elements.

Scatters and Wilds in freefall - let's get going.

This game is supplied by NYX out of Malta and is certified by the UK Gambling Commission as having been independently tested and up to the required standards for players in the UK.

As such this game is not regulated by the Alderney Gambling Control Commission and it is outside of their jurisdiction. If you experience any difficulties with this game or any other game you should follow our Complaints procedure and contact us.

Find all of your best online mobile slots at The Phone Casino.
Six reels: five main reels with symbols of different types and one bonus reel with special elements.

Five central reels show fifteen symbols in the same time. The sixth reel has the only one icon during the regular spins.

Up to thirty active lines

Bets per each of the lines must be same.

At least three same elements have to be situated next to each other from left to right, starting from the first reel. As usually, only the longest combination at each of the lines is taken in account.

An amount of the win depends on two parameters: the bet per line is multiplied by an index of formed combination, which varies from x5 to x200 in this game.


The basic symbols of this game are playing cards from nine to ace, a tam-tam, a waterfall, a mask, a boa, a child and spears.
There are also some special symbols here:

Wild (a gorilla) drops out at the third, fourth and fifth reels. This symbol doesn't form any combinations on its own, but it replaces ordinary symbols when necessary. Wild may show in stacks.

Scatter (a logo of «Big Thunder») is paid independently of the active lines and its location at the screen. Wins are calculated by the total bet. At least three Scatters trigger free spins.

King Strike (a golden crown) drops out at the sixth reel during paid spins, where it is mixed with empty cells.

Bonus Reel Feature – fifteen free spins on the casino’s expense. An amount of the bet and number of the active lines remain the same till the end of the round. The sixth reel enlarges and becomes the same as five regular. Big Thunder and multipliers (x3 and x5), which raise the payoffs, appear there. An alternative set of symbols in used during free spins. They don't take all cells at the screen, but form combinations in Scatters way (at any positions).

King Strike Bonus – if a combination of five same symbols is formed at fire reels and a crown appears at the sixth reel, you win one of four jackpots.

A bet is placed only when it has been received by our server from your handset using our software. Once a bet has been placed it is final and binding and cannot be cancelled or changed. For the avoidance of doubt, a bet remains valid even if the result cannot for any reason be displayed back to your handset (due, for example, to a network failure, interruption of communication, or if you receive a phone call). In the event of a game termination, any relevant jackpot will be paid out on a random draw authorised by the regulator.

The theoretical average return to player (RTP) is up to 94.38%. This RTP represents the long-term expected payback of the game which has been calculated by an independent testing company and monitored monthly.

Malfunction voids all plays and pay outs.

Unresolved bets placed but remaining undecided in incomplete games will become void after 90 days and will be forfeited to charity.