Frog Grog Demo Mode

Thunderkick have brewed this concoction from flasks, jars and blue vapour. Inside are cascades, wild frogs and the random Mystery Game. The release came out in 2016. Below, we break down the mechanics and the feel of the slot without rose-tinted glasses. The demo version is available directly on the review page, and you can find other games from this provider in the online slots section on Legalbet.

96%
Return to player
RTP means Return to Player and describes the theoretical payout ratio of casino games. The higher the RTP, the higher percentage of your bets you can expect to get back in the form of winnings. The RTP in real-money casinos can differ.
1616x
Max win
Medium volatility
Volatility
Volatility, in online gambling, is a term used to assess the risk of losing a bet. In other words, it suggests how rare or often players can expect to win or how big or small they can expect the prizes to be.
Slots
Game type
0,1
Min bet
The lowest amount a player can wager on a specific game. It is also a bonus requirement where you can bet above a certain amount to claim your bonus.
100
Max bet
The rule which indicates the highest amount you can bet on a casino game. It is also a bonus requirement where you can only bet up to a certain amount to claim your bonus.

Where to play for real money?

All casinos
Betfred Casino Review
Bet £10 Get 200 Free Spins
Play
JeffBet Casino Review
100% welcome bonus up to £100
Play
Bluefox Casino Review
Welcome Package Up To £1,000 + 100 Free Spins
Play
10bet Casino Review
Welcome Bonus play £100 get £25
Play
Gentleman Jim Casino Review
This casino currently has no bonuses
Play
Hollywoodbets Casino Review
100 Free Spins
Play
247Bet Casino Review
100% Deposit Match up to £247 + 100 Free Spins
Play
Cosmic Spins Casino Review
Welcome Offer 100% Bonus Match up to £50
Play

Information

Bonus game
Available on mobile
Jackpot
Quickspin
Auotoplay
Demo mode
Game developer Thunderkick
Release date 03.10.2016
Last page update February 2026

More games by Thunderkick 18

Frog Grog: Design and Theme

🖼️ Graphics

On the screen is a witch’s shelf divided into neat compartments that hold potions and fireflies in frames. On the left, a vertical multiplier meter flickers: x1 → x2 → x3 → x5 → x7. The base game has a warm, cosy feel, with the cauldron glowing amber, candles crackling, and the glass shimmering with highlights. In the Mystery Game, everything shifts to colder tones: the shelf is flooded with blue fog, and the unnecessary symbols disappear as though dissolving into vapour. The atmosphere floats somewhere between a fairy tale and an alchemist’s laboratory, where something tasty is bubbling and occasionally exploding.

🎶 Sound

A calm, mystical melody — a soundtrack fit for an alchemical lab — plays in the background. The glassy clink of little flasks emphasises the cascades, soft flares accompany the rising multiplier, and the wild frog “explodes” with a characteristic pop, burning away its row and column. When the Mystery Game triggers, the music cools down, with added rustles and muffled sparks that heighten the sense of late-night tinkering over a cauldron. The audio is subtle, doesn’t tire during long sessions, and helps you read game states without needing on-screen prompts.

Frog Grog Mechanics

🥁 Grid Size

5x3

📊 Paylines

23

➕ Bonus Game

🤑 Jackpot

💸 Extra Bet / Ante Bet

🪂 Fixed Multipliers

♻️ Respins

❎ Gamble

Winning Combinations

Before playing Frog Grog, take a look at the payouts in this slot.

Top Symbols:

Symbol

3

4

5

Moth in Lantern

x0.8

x1.7

x10

Flower under Dome

x0.6

x1.2

x6

Red Flask with Heart

x0.3

x0.6

x3.5

Base Symbols:

Symbol

3

4

5

Purple Potion

x0.3

x0.6

x3

Green Triple Flask

x0.2

x0.4

x2.5

Blue Vial

x0.2

x0.4

x2

Special Symbols

  • Wild Frog (orange or blue frog): substitutes for any regular symbols. After all wins are awarded, it “breathes out” fire and removes all symbols in its row and column. It does not affect other frogs. It may remain on the grid until the end of the game round or until it next participates in a payout.
  • Win Multiplier (left column x1–x7): increases by one step for each successful cascade. In the Mystery Game, the slot counts all wins within the mode and adds multiplier steps for each of them. The meter does not rise above x7.

Bonus Game

  • Triggers randomly when no further cascades are possible.
  • The game removes all symbols except the moth, the flower and the wild frog.
  • Removed symbols are also paid according to the paytable. The game counts them as a standard combination on a line.
  • After the mode ends, the multiplier receives additional steps for every win achieved during the Mystery Game.
  • The round finishes once all removals and payouts are completed, then the grid returns to the regular game.

RTP, Volatility, Maximum Win

The stated RTP is 96.1%. Volatility is medium. The maximum win is x1,616 times the stake.

Our Verdict

Frog Grog is a slot for those who enjoy “breathing” through cascades and waiting for the right chemistry between the wild and the multiplier. It’s not about wild x1,000 hits from a single spin, but about chains and careful progression on the left-hand meter. The Mystery Game is enjoyable precisely because it arrives unexpectedly and can finish off a grid where the round had already seemed over. A drawback is that without the frog, rounds can sometimes feel like a calm laboratory shift.

If you want alternatives: Voodoo People — darker in mood with a focus on the voodoo theme, suitable for those seeking a more hardcore atmosphere. Midas Golden Touch 2 — higher volatility and stronger potential for players who enjoy bonus rounds with accumulating boosts and dense dynamics.

Other popular slots by Thunderkick

Hot PotatoPink Elephants 2Fortune Cats Golden StacksFrog GrogSpectraMidas Golden Touch 2BabushkasPhoenix ParadiseLava LavaFlame BustersTurning Totems

Post by:

Andy H
Andy H
Site Manager
Copy the token