How is the bonus triggered in Thunder Coins XXL: BoosterCells?

When coins appear on reels 1 and 3 and a Thunder Coin appears on reel 2.

What is the BoosterCells feature?

During the bonus, the cells store coin values; if a new coin lands on a cell with a value, the two amounts add up.

What does the Thunder Coin do?

It collects the values of all coins in play, including one of the 4 jackpots, and can boost the values stored in the cells.

What is the Thunder Spin?

An Extra Bet option that triples the chance of accessing the bonus and guarantees a Thunder Coin on every spin.

What is the slot’s RTP?

The RTP of Thunder Coins XXL: BoosterCells is 95.65%.

Lobby
Slots
Games Provider
Playson
Thunder Coins XXL: BoosterCells

Thunder Coins XXL: BoosterCells

Game Theme

Provider

Volatility

RTP

95.64% - 95.65%

Max Multiplier

Min Bet

0.10 CHF

Max Bet

4'000.00 CHF

Description

Thunder Coins XXL: BoosterCells is the new chapter in the Thunder Coins series by Playson, one of the provider’s most recognisable game families. The look combines the style of classic slots with an electric atmosphere of coins and lightning. Release date: 17.09.2026.

The bonus is triggered by coins on reels 1 and 3 together with a Thunder Coin on reel 2. The new feature is BoosterCells: grid positions store coin values, which add up when a new coin lands in the same cell and can be boosted by Thunder Coins. The game also features 4 jackpots. Two Bonus Buy options and two Extra Bet options are available. The slot has an RTP of 95.65%.

Graphics and Symbols: Coins Charged with Energy

Design and Atmosphere

The style follows that of the Thunder Coins series: classic land-based slot symbols, glowing gold coins and electric bolts running across the reels. The BoosterCells make the stored values visible, so you can follow the growth of prizes spin after spin.

Symbols

Paying symbols – Classic symbols from traditional slots.
Coins – Carry cash values or one of the 4 jackpots; in the bonus, the values are stored in the cells.
Thunder Coin – Collects the values of all coins in play and can boost the stored values.

Sound Effects and Soundtrack

The audio accompanies the electric theme with energetic effects, dedicated to the arrival of Thunder Coins and the build-up of values in the cells.

Features and Bonuses: BoosterCells and Thunder Coin

Thunder Coins XXL: BoosterCells keeps the series formula and introduces a value-accumulation mechanic.

Feature	Trigger	Effect	Technical Details
Thunder Coin	Symbol appears	Collects the values of all coins in play.	Includes one of the 4 jackpots Active in the base game and the bonus
Bonus Game and BoosterCells	Coins on reels 1 and 3 + Thunder Coin on reel 2	The cells store and combine values.	Coin on a cell with a value: the values add up Thunder Coins can boost several stored values
Bonus Buy	Base game	Direct access to the bonus.	Standard Buy Bonus Game Super Buy: 3 active Thunder Coins guaranteed
Extra Bet	Betting option	Higher chance of accessing the bonus.	Thunder Spin: bonus chance tripled One Thunder Coin guaranteed on every spin

BoosterCells

During the bonus, each grid position stores the value of the coins that land on it. If a new coin lands on a cell that already holds a value, the two amounts are combined. Thunder Coins can also randomly boost several stored values at once.

Thunder Coin

The Thunder Coin collects the values of all coins in play, including one of the four jackpots, and adds them to the spin win in the base game or to the total win in the bonus.

Conclusion — A Classic Series with a New Charge

Thunder Coins XXL: BoosterCells keeps the simplicity of the series and adds an accumulation mechanic that gives the bonus more depth: each cell can grow in value, and Thunder Coins step in to boost and collect.

In summary: triggered by coins on reels 1 and 3 and a Thunder Coin on reel 2, BoosterCells feature, 4 jackpots, Bonus Buy and Super Buy, Extra Bet with Thunder Spin and RTP of 95.65%. In the slot catalogue of an online casino, it sits alongside other Playson titles such as 4 Supercharged Clovers: Super Wheel and Golden Penny x1000: Super Wheel.