Thunder Coins XXL: BoosterCells

Thunder Coins XXL: BoosterCells is a classic fruit-machine slot from Playson with a new twist for the Thunder Coins series. It was released on 17 September 2026 and plays on a tall board of 3 reels and 5 rows. Cherries, plums, oranges, bells, BAR plates and red sevens are lit by blue lightning, and the golden Thunder Coin is the symbol that matters. The RTP is 96.25%, the volatility is medium-high and the maximum win is 5,000x the bet.

Lightning Behind The Reels

The look is a mix of old and new. The symbols are simple fruit-machine icons on dark blue cells, but the frame crackles with electric arcs, and a pile of gold coins glows in the bottom left corner next to the red Bonus button. Four jackpot plates sit above the reels in red, green, blue and purple, labelled Grand, Major, Minor and Mini. At a bet of 1.00, they displayed 1000.00, 100.00, 30.00 and 15.00, which means they are fixed prizes of 1000x, 100x, 30x and 15x the bet.

Thunder Coins In The Base Game

The golden coin with a lightning bolt is the special symbol of the game. A normal Coin carries a cash value or a jackpot label, and the Thunder Coin collects them. When a Thunder Coin lands together with any Coin symbol, it gathers the values of all Coins in play, including one of the four fixed jackpots, and adds them to the win. The same thing happens in the bonus game, where the amount goes to the total win of the round. A random Pile of Gold feature can also be set off by any Coin that lands, and it adds more Coin and Thunder Coin symbols on the way to the bonus game.

How The Bonus Game Starts

The Bonus Game begins when Coins land on reels 1 and 3 together with a Thunder Coin on reel 2. The bells, fruit and BAR plates form ordinary line wins in between, and the Extra Bets switch on the left offers two options. One of them is a Thunder Spin, which raises the chance of reaching the bonus and guarantees a Thunder Coin on every spin.

The BoosterCells Feature

The novelty is the BoosterCells mechanic, introduced with the slogan Boost values with every hit! The bonus screen shows a small example board: coins with values of 1, 5, 10 and 13 surround a large, glowing coin showing 15. In the bonus game, the collected Coin values are stored on the reels, and they can grow during the round. If another Coin lands on a position that already holds a stored value, the two values combine, and Thunder Coins can also boost several stored values at random. The bonus board shows small labels such as +1.00, +2.00 or +6.00 on empty cells, which are the amounts that the cells add to a coin landing there.

The effect is easy to follow in the demo. One column of coins started at 3.00, then rose to 5.00, 8.00, 10.00, 16.00 and finally 24.00 each as the round went on, so a modest bonus can turn into a large one. The values add up across the whole round rather than being reset on each spin.

A Hold And Win Round With Jackpots

Because the coin values stay on the board, the bonus follows the Hold and Win pattern that the Thunder Coins series is known for, with jackpots and sticky coins. The four fixed jackpots are part of the Coin values that the Thunder Coin collects, so the Grand prize of 1000x stays in play for the whole round. The feature list of the game also includes a Cash Collector element and a Bonus Bet, in line with the rest of the family.

Bonus Buy: 75x And 200x

The Bonus button opens a window with two cards:

• Bonus Game costs 75x the bet and starts the round with at least one Thunder Coin;
• Super Bonus Game costs 200x and guarantees three or more Thunder Coins from the start.

The bet can be changed with the minus and plus buttons in the same window, and the price updates accordingly. In the demo, buying the Super Bonus Game at a bet of 1.00 reduced the credit from 11,000.00 to 10,800.00, and the first screen of the round showed three Thunder Coins in the middle reel with 1.00 coins on both sides.

Controls And Information

The interface is typical for Playson. The large orange spin button is on the right, with an autoplay icon above it. The credit, total win and bet displays run along the bottom, and the sound, information and menu icons are in the corner. The info page is where the game rules and the exact RTP for your casino are listed.

RTP And Volatility

The RTP of 96.25% is close to the industry average, and the medium-high volatility means that the base game pays small wins while the bonus game provides the bigger results. The maximum win is 5,000x. With the Grand jackpot at 1000x, a lucky bonus round can reach the top end through boosted coin values and jackpots together.

A Fruit Machine With A Reason To Stay

This slot suits players who like the clean look of classic fruit machines but want a modern bonus with a clear idea. The BoosterCells feature gives a visual reason to watch every coin land, the buy options let you skip straight to the action, and the jackpot plates give a target. Players who prefer long free spins rounds with many different symbols will find it simple, so a few demo rounds are the best way to judge whether the coin collection is exciting enough.

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