| RTP | 96.1% |
| Volatility | Very High |
| Max win | 150,000x |
| Provider | Relax Gaming |
| Release | 2023 |
| Grid | 6x6 (base) · Money Cart 6x4 expanding to 6x8 |
| Mechanic | Scatter Pays + Money Cart respins bonus |
| Bets | $0.10 – $6 (varies by casino) |
| Multipliers | Symbol values combine via Collectors & Multipliers in the Money Cart |
| Free spins | Money Cart bonus: 3 respins, reset to 3 on every new symbol |
| Mobile | Yes |
RTP & max win are the provider's published figures. Some operators run modified RTP versions — always check in the game info panel. 18+ · Play responsibly.
Play Money Train 4 for free (demo)
Try Money Train 4 below with virtual demo credits — same math model, same features, zero real money. I always recommend a demo session first to feel the variance before you ever consider real stakes.
My review of Money Train 4
My experience
I have played every Money Train since the original, so I came to Money Train 4 with high expectations and a healthy dose of suspicion — sequels in this genre often just inflate the max-win number and call it a day. Relax Gaming did inflate it, to a ridiculous 150,000x, but they also did real design work, and after many sessions I think this is the most complete entry in the saga.
The presentation leans into a steampunk-meets-Wild-West world of robots and outlaws, and the sound design earns its keep: the base game hums along quietly, then the music shifts the instant a Respin starts gathering bonus symbols. As a poker player whose job is reading the table for tells, I appreciate how clearly the game signals when something is about to matter. The trouble is that 'something' is rare. The base strip is two rows tall and pays almost nothing on its own — it exists purely to occasionally hand you the Money Cart.
The Money Cart itself is where the game lives, and it is superb. You start with 3 respins, every new special symbol resets the counter to 3, and the grid can climb from 6x4 up to a towering 6x8 as Unlockers reveal rows. The 21 symbol types interact in ways that take a few bonuses to fully appreciate — Collectors sweep up the values of every other symbol, Persistent Collectors do it every remaining spin, Payers add value, Snipers target specific symbols, Necromancers revive dead ones, Shapeshifters transform, and so on. When the chain clicks, watching a Persistent Collector hoover up an Upgraded board is one of the best feelings in slots.
Now the honest part, and I won't dress it up. As a numbers person I think in expected value (what a bet returns on average) and variance (the size of the swings), and Money Train 4 is engineered to concentrate almost all of its return into rare, enormous bonuses. The vast majority of Money Carts I have triggered or bought returned less than they cost. The 150,000x cap is a headline, not a target — you can play this game for a very long time and never see four figures times your bet. That is the deal the math offers, and no amount of feature-buying changes it.
My practical take: pick a stake where a long cold run will not tilt you, decide your session budget before you spin, and never buy a Money Cart to chase what you have already lost. On those honest terms, this is a brilliantly built, genuinely thrilling slot.
Strengths
- The Money Cart bonus is one of the deepest and most exciting respin features in slots, with 21 interacting symbols
- Highest ceiling in the series — a colossal 150,000x max win
- Expanding 6x4-to-6x8 grid makes every triggered bonus feel like it could keep growing
- Solid 96.10% default RTP (around 96.50% on the feature buy) for an extreme-variance title
- Polished steampunk-Western theme with excellent, well-timed sound design
- Two feature-buy options (100x standard, 500x with a guaranteed persistent symbol) where legal
- Flawless HTML5 performance on mobile and desktop, and a free demo to learn it
Weaknesses
- Extreme volatility — the base game pays almost nothing and most bonuses return less than they cost
- The 150,000x max win is a mathematical ceiling, not a realistic expectation
- Reduced-RTP versions can circulate at some casinos — always check the in-game info screen
- The 21 special symbols have a real learning curve before the bonus fully makes sense
- Feature buys are expensive (100x–500x) and frequently return a blank, so they punish chasing
Who is Money Train 4 for?
Money Train 4 is built for players who chase the one unforgettable bonus and can stomach a long string of forgettable ones to get there. If you already love Relax Gaming's earlier Money Train titles, or high-ceiling collect-the-symbols features like Razor Shark (reviewed here), this sits right in your wheelhouse — a thin base game, a deep and explosive bonus, and a max win that exists mostly to fuel dreams. It also rewards patience and study: the 21 Money Cart symbols give the round real texture once you learn how they chain. Curious beginners are not shut out — the free demo on this page costs nothing and is the best way to feel the Money Cart before risking a cent, and at minimum stakes the spectacle is cheap entertainment. But be honest about your temperament first. If long dead stretches frustrate you, or a 500x feature buy returning a fraction would tilt you, keep stakes tiny or choose a gentler game. Whoever you are, only ever play with money you can afford to lose. 18+.
How Money Train 4 works
Under the steampunk hood, Money Train 4 is a 6x6 scatter-pays slot — matching symbols pay anywhere on the grid (8+ for high symbols, 10+ for low), with no fixed paylines. The default RTP is 96.10% (return to player — the long-run share of bets paid back), rising to roughly 96.50% on the feature buy; lower configurations may exist, so verify the figure in your casino's info screen. The base game is mostly a launchpad for the Money Cart bonus round, where the real engine — 21 special symbols, persistent multipliers and an expanding grid — lives. The maximum win is capped at 150,000x your stake. Here is every mechanic in detail.
Scatter Pays (base game)
There are no paylines. Wins are awarded when 8 or more matching high-pay symbols, or 10 or more matching low-pay symbols, land anywhere on the 6x6 grid. Winning symbols are removed and the others stay put — but unlike a tumbling slot, this is not a cascade engine; the base game is deliberately lean and exists mainly to gather the bonus symbols that trigger the Money Cart. Expect most base-game spins to pay nothing, which is by design, not bad luck.
Respin Feature
When bonus symbols appear in the base game, the Respin feature locks them and respins the remaining positions, trying to collect enough bonus symbols on the reels to launch the Money Cart. It is the bridge between the quiet base game and the main event — and the moment the music tells you something might finally be happening. Landing enough Money Cart symbols during the Respin is how you trigger the bonus without paying for it.
Money Cart Bonus Round
The heart of Money Train 4 and the reason it exists. You start with 3 respins on a 6x4 grid; every new special symbol that lands resets the counter back to 3, so a hot board keeps the round alive. The bonus ends when no new symbols land in three consecutive spins, then pays out the combined value of everything on screen. This is where essentially all of the game's return is concentrated — and where the 150,000x ceiling is reached, on the rare occasions it is reached at all.
21 Special Symbols
The Money Cart is packed with 21 distinct feature symbols, far more than earlier entries. Among them: Collectors that sweep up every other symbol's value, Persistent Collectors that do it every remaining spin, Payers that add value, Snipers that target specific symbols, Necromancers that revive expired ones, Shapeshifters that transform symbols, Arms Dealers, Resetters that refill the respin counter, Unlockers that reveal new rows, and Upgraders that level symbols up. Their interactions are the whole game — and they take a few bonuses to fully appreciate.
Expanding Grid (Unlockers)
The Money Cart starts at 6x4 but Unlocker symbols open additional rows, growing the playing field all the way up to a towering 6x8. A bigger grid means more positions for collectors to gather and more room for the round to snowball. Watching the cart climb row by row, with persistent symbols multiplying across an ever-larger board, is the mechanic that makes the biggest hits feel genuinely possible rather than abstract.
Feature Buy & Bet Range
Where regulation allows (not in the UK, for example), you can skip the wait and buy the Money Cart directly. There are two options: pay 100x your bet for a standard entry, or 500x for an entry that starts with one guaranteed Persistent Symbol. Stakes run from $0.10 up to $6 per spin at most casinos. My honest take as a numbers guy: the feature buy is a convenience, not an edge — the RTP of a bought bonus is broadly in line with playing for it naturally, and a buy returning a blank is a very real, frequent outcome. Budget accordingly and never buy to chase losses.
RTP Versions — Check Before You Play
Relax Gaming publishes Money Train 4 with a default RTP of 96.10%, rising to roughly 96.50% on the feature buy. As with most modern slots, operators can sometimes license reduced-RTP configurations, and the gap matters enormously over any meaningful number of spins. Before depositing anywhere, open the game's in-client info screen (the 'i' button) and verify the RTP figure yourself. This is the single most practical piece of advice in this review.
Money Train 4 FAQ
Where to play Money Train 4
Money Train 4: The Last Stand is the most complete entry in one of the best bonus-driven series in slots, and the Money Cart remains one of the most thrilling respin features ever built — 21 interacting symbols, an expanding grid and a colossal 150,000x ceiling. I rate it 8.7/10, docked only for the punishing, near-dead base game and the genre's usual reduced-RTP risk at some casinos. But be honest with yourself before you climb aboard: this game will take far more sessions than it gives, the overwhelming majority of your Money Carts will return less than they cost, and the 96.10% RTP means the house keeps its edge no matter what you do or how much you buy. Play the free demo on this page first, verify the RTP, set your limits, and enjoy the ride. 18+ — play responsibly.
30 free spins or 50% freebet — Casino code MOON or sport code MOONSPORT — not cumulative
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