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Frog Grog

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Frog Grog is a slot machine from Thunderkick with a game play I've never seen before on any type of slot game. The feature I'm talking about is the "dropping symbols" feature. While dropping symbols known from for example Gonzo's Quest normally removes winning symbols, for new symbols to fall down from the top, the non-winning symbols on Frog Grog will stick to where they landed, while the winning symbols will be replaced by new symbols on those exact positions. I think this is an interesting concept, and combined with the win multiplier that can be seen on the left side of the game, this gives the game a decent win potential. There are no free spins or bonus games on this machine, but there is a mystery game that can popup after any finished spin. According the official slot sheet from Thunderkick, the maximal potential win is 1.616x the stake per spin. This is a decent maximal win and I would rate this to be a medium volatile game. The payout percentage for this different and innovative Thunderkick slot machine is 96.10%.

Game data

Slot name



Release date


Free spins

Bonus game


Frog Grog Thunderkick 96.10% 2016-10-12 23




This slot machine is available on these casino platforms:
Computer, Mac, iPad, iPhone and other mobile devices.

18+ required - New customers only - BeGambleAware - T&C apply!


Read more about the game features below the screenshot!

Game screenshot

Game features

Frog Grog has wild symbols on all the reels, and it's the red frogs that are wilds. These symbols will substitute for any other symbols in play, and they will also remove all symbols on the same row and column before they turn blue. The removed symbols will then be replaced with new symbols, while the blue frog will stick to the reel until it's included in a winning combination or until the game round is finished. For each time new symbols appear during the same game round, the multiplier shown on the left side of the game will increase one step. The multiplier always start at x1, while it can reach a maximum of x7 after 4 symbol drops have occurred. There is a mystery game at Frog Grog and it can be activated randomly after any spin.

Mystery game: The mystery game can popup after any game round where the dropping symbols have stopped. The mystery game will trigger a scatter pay feature for the symbols shown on the screen. The butterflies, the flowers and the frogs will stick to the reels, while all other combinations will be removed, or award a pay if you have 3 of a kind or more of them. The pays are per the normal paytable, and the highest pay is for a 5 of a kind combination, even though it might be more symbols in the combination. When all symbols are removed, the multiplier will increase one step per winning combination before new symbols are added to the current reels.

Casino to play at / Provider

Frog Grog is created by Thunderkick.
Read more about Thunderkick!

18+ required - New customers only - BeGambleAware - T&C apply!


18+ required - New customers only - BeGambleAware - T&C apply!

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