Super Thunder Express

Super Thunder Express Slot Review

A black steam engine looms behind the reels, headlamp blazing, blue electricity crawling along the boiler while lightning fans out across a near-black sky. Super Thunder Express charges you admission to a jackpot chase and treats the reels themselves as a waiting room – and honestly, it’s built well enough that the wait has its own pull.

Above the grid, three gold-rimmed medallions hold glowing locomotive faces. Fugaso has bolted a four-tier jackpot chase onto one of the oldest templates in the business, and the contrast is the whole point: a paytable of bells and cherries underneath, a progressive-style prize structure humming above.

It runs a 5×3 grid with 10 fixed paylines and a 96.15% RTP. From a 10x top line win to a Grand Jackpot is a long stretch of track, and this game spends everything it has getting you there.

Base Game & Features

Ten lines, all fixed, paying left to right in succession. Only the highest win on each line counts. That’s the whole engine room: no ways to win, no cascades, nothing that rewrites how a spin resolves.

Because every line is fixed, there’s no choosing your exposure. A spin covers all ten lines at once, and the bet you set is the bet the whole board plays at. Simple, and deliberately so.

Eight symbols fill the table, every one of them a classic, and the values are multiples of the bet:

• Bell: three pays 2.5x, four pays 5x, five pays 10x
• BAR: three pays 2x, four pays 4x, five pays 8x
• Watermelon: three pays 1.5x, four pays 3x, five pays 6x
• Grapes: three pays 1x, four pays 2x, five pays 5x
• Plum: three pays 1x, four pays 2x, five pays 4x
• Orange: three pays 0.8x, four pays 1.5x, five pays 3x
• Lemon: three pays 0.5x, four pays 1x, five pays 2.5x
• Cherry: three pays 0.5x, four pays 1x, five pays 2x

Those are modest numbers by any standard. A five-of-a-kind bell pays 10x, and everything below it slides down from there. The gaps between tiers are small too: grapes and plum pay identically at three and four of a kind, and the lemons and cherries are nearly interchangeable.

Line wins in this game are pocket money, and it isn’t shy about that. The money lives somewhere else entirely.

Special Bonus Symbols

The real currency here is the Special Bonus symbol, a lightning-charged coin that arrives in one of four colours: green, blue, red or gold. Only one colour can appear per spin, landing either one, two, three or five at a time.

Each coin that lands is collected into the matching medallion above the reels, and every collection carries a chance of triggering the bonus game outright. One coin can do it. Three can do it.

Land five Special Bonus symbols on a single spin and the bonus is guaranteed, no chance about it.

Lucky Riches

Whenever a coloured Bonus symbol lands during the main game, there’s a chance the Lucky Riches feature fires. It adds enough Bonus symbols to the reels to trigger the bonus game on the spot, which makes every coin that arrives a small held breath.

Super Thunder Express Running Wins Bonus Game

The Running Wins Round

The green, blue and red coins all open the same door: the RUNNING WINS Bonus Game. It starts with three Re-Spins, and every time a new Special Bonus symbol lands, the count resets back to three. Each coin that arrives stays on the reels until the round ends.

Only coins of the colour that triggered the round can land, up to five per spin. The round ends when every position is filled or the Re-Spins run out, and then each coin pays out according to its colour:

• Green: 1x, 2x, 3x, 4x or 5x the bet, or the Mini Jackpot
• Blue: 3x, 4x, 5x, 6x, 7x, 8x, 9x or 10x the bet, or the Minor Jackpot
• Red: 6x, 7x, 8x, 9x, 10x, 11x, 12x, 13x or 14x the bet, or the Major Jackpot

The ladder matters more than it first looks. A red round filled with coins is worth roughly three times a green one, so which medallion opens the door changes what the round is worth before a single respin plays out.

The reset is what stretches a round out. A board that’s nearly full of sticky coins still has three respins of life in it, and each new landing buys three more. A round can run considerably longer than its opening count suggests.

It only dies when three consecutive respins come back empty or the grid runs out of room.

The Super Bonus Game

Gold coins are the rare ticket. They trigger the RUNNING WINS Super Bonus Game, which plays by exactly the same rules but skips the cash ladder entirely. Every gold coin is awarded a jackpot prize: Mini, Minor, Major or Grand.

Fill the board with gold and the jackpots stack, which is where this game’s real ceiling lives.

Buy Feature and Bonus Hunt

Both bonus games can be bought from the main game via the BONUS button. The round begins at the bet value that triggered the purchase, so what you pay for scales with what the round plays at. There’s a middle option as well:

• RUNNING WINS Bonus Game: 80x the current bet
• RUNNING WINS Super Bonus Game: 200x the current bet
• Bonus Hunt: 2x the bet, making the bonus game 5x more likely to trigger

The Super Bonus price is steep on a paytable this thin. Bonus Hunt at 2x is the more interesting purchase, quietly improving the odds without committing a full stack to one door.

One catch: Bonus Hunt raises the odds of the standard round, not the gold one. It’s a path to the ladder rather than the jackpots.

Our Honest Verdict

Overall Rating: 7/10

This is a game you play for the storm, not the scenery. Every spin of Super Thunder Express is really a bet on those lightning coins, and once you accept that, the loop is quietly gripping: a single coin can open the door, and the Lucky Riches top-up means you never quite know which one will.

The respin round is the best thing here, because the reset keeps a dying round alive. Just when you’ve written it off, one landing buys three more spins and a board of sticky coins keeps growing. It’s a proper finish, and the colour ladder means the round you get is never quite the round you expected.

The reels themselves let it down. Ten paylines, 10x for the best hand, and long spells where nothing lands worth counting. Anyone who wants a base game with its own rewards will find this thin. But for players who enjoy waiting on a jackpot and feeling every coin land, this train is well worth the fare.

Super Thunder Express FAQs

• What is the RTP of Super Thunder Express?

  The RTP is 96.15%.
• How many paylines does Super Thunder Express have?

  There are 10 fixed paylines. Wins pay left to right in succession, and only the highest win on each line is paid.
• What is the grid size of Super Thunder Express?

  It’s a 5×3 grid: five reels and three rows.
• How does the RUNNING WINS Bonus Game work?

  It starts with three Re-Spins, and the count resets to three every time a new Special Bonus symbol lands. Only coins of the colour that triggered the round can appear, up to five per spin, and each one stays in place until the round ends. It finishes when the board is full or the Re-Spins run out, then every coin pays its assigned prize.
• What do the Gold Special Bonus symbols do?

  They trigger the RUNNING WINS Super Bonus Game, which follows the same rules but awards only jackpot prizes. Each gold coin pays the Mini, Minor, Major or Grand Jackpot.
• What is the Lucky Riches feature?

  Lucky Riches can kick in after any coloured Bonus symbol lands in the main game. It tops the reels up with enough extra Bonus symbols to start the bonus game straight away.
• Can you buy the bonus on Super Thunder Express?

  Yes. The RUNNING WINS Bonus Game costs 80x your bet and the Super Bonus Game costs 200x. There’s also a Bonus Hunt option at 2x the bet that makes the bonus game 5x more likely to trigger.
• Who makes Super Thunder Express?

  Fugaso.