Thunder Coins XXL Slot by Playson

The XXL in the name is the point of difference. The middle reel is stretched to five positions, so the Thunder Coin collectors have more room to land and the bonus game runs bigger than the original. There are no cascading reels and no separate free spins round - the value sits entirely in reaching the Hold and Win, either in normal play or through a bonus buy. Players who know Playson's other Hold and Win titles will recognise the coin-collect idea straight away. The summary below sets out the core numbers before we walk through how each part works.

How to play Thunder Coins XXL

Set your total stake with the bet controls under the reels, from AUD 0.20 up to AUD 100. All 15 paylines are fixed, so every spin covers the whole board. Press Spin for a single round, or use autoplay to set a run of spins with your own limits.

Wins pay from the left along the paylines, and only the highest win on each line counts. Three matching symbols on a line pay out. The Triple 7 is the top symbol and the wild, standing in for the regular pays. The Thunder Coin symbol lands on the middle reel, and when enough bonus symbols appear alongside it the Hold and Win round begins. A Turbo option speeds up the spin if you want a quicker pace.

Thunder Coins XXL rules

This is a classic-styled slot, so the paytable is led by fruit and lucky-seven symbols rather than a large themed cast. Values below show the shape of the table; exact figures can vary between casino builds, so check the in-game paytable before you play.

Symbols and payouts

• Wild - Triple 7: substitutes for the regular paying symbols and pays 30x for three of a kind, the top line award in the base game.
• Thunder Coin: lands on the middle reel. Together with bonus symbols on the outer reels, it starts the Hold and Win round, and it acts as the collector inside it.
• Bonus and Jackpot symbols: only relevant to the Hold and Win. Jackpot symbols carry the fixed prizes; bonus symbols carry cash values.

Thunder Coins XXL bonus features

Hold and Win bonus game

The Hold and Win starts when bonus symbols land across the reels alongside a Thunder Coin on the middle reel. Those symbols lock in place, everything else clears, and you get three respins. Each new bonus symbol that lands locks too and resets the counter back to three, so the round keeps going as long as fresh symbols keep arriving. During the bonus only Bonus, Jackpot and Thunder Coin symbols appear, which raises the chance of the round building.

The Thunder Coins act as sticky collectors on the middle reel - up to five can lock across its five positions - gathering the values shown on the bonus symbols as the respins play out. In testing on a AUD 1 spin, most rounds ended on a mid-sized collect from the accumulated bonus values, with the bigger results coming when the middle reel filled with collectors early and left several respins to gather more.

Jackpots

Four fixed jackpots sit inside the Hold and Win, landing from Jackpot symbols on the board: Mini at 15x, Minor at 30x, Major at 100x and Grand at 1,000x the bet. They are fixed rather than progressive, so the values do not climb between players, and the Grand is the top single prize the feature offers on its own.

XXL grid

The XXL label refers to the stretched middle reel. Where the original Thunder Coins had fewer collector positions, this version runs five on the middle reel, so the Hold and Win has more room for Thunder Coins to land and stick. That larger collector column is the main reason the bonus round pays more here than in the standard game.

Bonus buy in Thunder Coins XXL

Thunder Coins XXL offers a bonus buy. Instead of waiting for the symbols to line up, you can pay a set price to open the Hold and Win straight away.

The Super Bonus can build toward as many as five Thunder Bonus symbols on the middle reel, which is the fuller version of the round. The bonus buy is not available in every jurisdiction, so check that the option is present at your casino before you register.

Thunder Coins XXL on mobile

Thunder Coins XXL is built in HTML5 and runs in the browser on both iOS and Android, with no separate download or native app required.

• We tested on an iPhone 14 in Safari and a Samsung S23 in Chrome, on standard Australian 4G and home broadband.
• The tall three-by-five grid suits a phone screen and holds its layout in portrait, with the bet and spin controls below the reels.
• Every feature works the same on mobile - the sticky Thunder Coin collectors, the jackpot symbols and the bonus buy panel are all present.
• Load times were short on both devices, and the classic fruit-and-seven artwork stays sharp without slowdown during the respin round.

Our take

Thunder Coins XXL suits players who like a focused Hold and Win slot with a classic look and a clear jackpot ladder. Its strengths are the enlarged middle reel that gives the collectors more room, the four fixed jackpots up to a 1,000x Grand, a fair 96% RTP, and a bonus buy with two clearly priced tiers for reaching the round faster.

The limits are worth stating. With everything riding on the one feature and no separate free spins round, the base game can feel repetitive between triggers, and the 5,405x max win is modest next to high-volatility ways slots. The medium-high volatility still brings quiet stretches, and the bonus buy adds cost. For players who want a straight coin-collect slot with a defined jackpot round, it holds up; anyone after layered features or a huge multiplier ceiling should look elsewhere.

Thunder Coins XXL FAQ

Who makes Thunder Coins XXL?

Thunder Coins XXL: Hold and Win is developed by Playson and was released on 29 May 2025. It is the enlarged version of the studio's earlier Thunder Coins slot.

What is the RTP of Thunder Coins XXL?

The RTP of Thunder Coins XXL is 96%. Some casinos run different RTP settings, so check the figure in the game's paytable before you play.

How do you trigger the bonus in Thunder Coins XXL?

The Hold and Win starts when bonus symbols land across the reels alongside a Thunder Coin on the middle reel. You can also open the round through the bonus buy.

Can you buy the bonus in Thunder Coins XXL?

Yes. The bonus buy costs 70x the stake for the standard Bonus Game with one Thunder Coin, or 200x the stake for the Super Bonus Game with three Thunder Coins. It is not available in every jurisdiction.

What is the maximum win in Thunder Coins XXL?

The maximum win is 5,405x your bet. Within the Hold and Win, the top fixed jackpot is the Grand at 1,000x, alongside the Mini, Minor and Major tiers.

Is Thunder Coins XXL available on mobile?

Yes. The game is HTML5-based and runs in the browser on iOS and Android, with all features working the same as on desktop.

Where can you play Thunder Coins XXL?

Thunder Coins XXL is available at a range of licensed Australian-facing casinos.

Player reviews of Thunder Coins XXL

• James, Sydney (2026): "The middle reel filling with Thunder Coins early is the dream - got four collectors with two respins left and gathered a stack of values plus the Major. Ended around x160 the bet."
• Sarah, Melbourne (2026): "Medium-high volatility, so the base game is quiet and the bonus is where it all happens. Bought the Super Bonus for 200x once and started with three coins - paid it back and a bit more that time."
• Tom, Brisbane (2026): "Classic seven-and-fruit look, which I like. No free spins though, it's all the Hold and Win. RTP at 96% feels fair and the Grand at 1,000x is a decent target."
• Emma, Perth (2026): "The tall grid actually sits really well on my iPhone. Triggered the bonus naturally twice in a session, average around x80. Never hit the Grand but the Minor dropped."
• Nick, Adelaide (2026): "Used the 70x buy a few times. Some rounds fizzled with one coin, others built up when more bonus symbols kept landing and resetting the respins. Variance is real."
• Chloe, Sydney (2026): "Simple and focused - you're playing for the coin round and nothing else. The five-position middle reel makes the XXL version worth it over the original for me."