First bonus-only slot from Relax Gaming. Wild West Hold & Win that expands from 5 to 7 reels, with 98% fixed RTP and a 2,000x cap.
Money Cart by Relax Gaming is one of those releases that quietly changed how the slot industry thinks about bonus rounds. Launched in December 2020 as a UK exclusive, it was the first slot from a major studio built entirely as a bonus feature. No base game, no spinning into nothing, no Buy Bonus button either, because the whole game IS the bonus. Why? Because the UKGC had just banned bonus-buy mechanics, and Relax Gaming basically said fine, we'll make the bonus the only thing on offer. Every other studio that later released a “bonus-only” title is borrowing from this blueprint.
The format is a stripped-down Hold & Win on a 5×4 grid, sat inside a brass-fitted iron wagon parked in front of a dusk-pink sky and a sleepy ghost town. Blurred saloon windows glow yellow, a windmill turns lazily behind the cart, tumbleweeds drift across the foreground. It's a much calmer scene than the chaotic interior of Money Train, and honestly the restraint works in its favour. Spins-left tally burned into the wood plaque on the left, running total on the right, that's the whole UI.
You start every round with three respins. Land any coin, Payer or Collector and the counter resets to three. Coins lock with values from 1x up to 200x bet. The Persistent Payer is a gatling-style cannon that sticks around and dumps its own value onto every visible coin and Payer after every spin, snowballing the totals. The Persistent Collector is a cowboy hat that does the opposite, sweeping the value of every coin and Payer into its own pile. Get both on the board and the math compounds fast, sometimes uncomfortably fast.
The Re-spin Feature is the kicker. It expands the grid from 5 reels to 7 mid-bonus, adding two extra strips of locked positions. That 5 to 7 expansion is unique to the original Money Cart, by the way. The sequels (Money Cart 2, 3, 4) all rebuilt the formula differently, so this one stays its own thing.
RTP sits at 98% and it's fixed, which is exceptional. Most slots ship with 94-96% and let operators pick lower configs. Volatility is high, hit frequency around 12.5%, bets from 0.10 to 500 EUR. The catch? Max win caps at 2,000x. That's modest by 2026 standards, when 10,000x and 50,000x are common. But the high hit rate and 98% return mean wins land often, just not the screenshot-worthy ones. A fair trade if you ask me, though anyone hunting massive multipliers will probably move on to the sequels.
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