Money Train 4 (Relax Gaming) Slot Review
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Money Train 4: Slot Overview
With Money Train 4, Relax Gaming brings the curtain down on one of the most iconic slot series in iGaming history. Released on September 20, 2023, this explosive final installment is the studio’s most ambitious and feature-rich slot to date. If Money Train 2 amped up the visuals and Money Train 3 expanded the gameplay, Money Train 4 takes everything nuclear.
This time, the action goes full dystopian sci-fi, leaving the sun-drenched badlands of earlier entries behind for a world that feels part Terminator 2, part Mad Max. The game features a 6×6 grid with a scatter pays system, a top prize of up to 150,000x your bet, and a wild array of persistent feature symbols capable of turning modest runs into legendary jackpots.
Relax Gaming isn’t just closing the series—they’re detonating it in a fireworks display of multipliers, respins, and bonus modifiers. Let’s explore how this mechanical beast barrels down the tracks.
Design and Graphics
Relax Gaming went all-in on the presentation for Money Train 4. The base game alternates between a bright, dusty desert reminiscent of a terraformed outpost and a foreboding, rain-slicked battlefield during the bonus rounds. The visual transition between the game’s phases creates a cinematic feel that reinforces the narrative of high-stakes heists and post-apocalyptic showdowns.
The game grid is fully embedded into a chrome-plated mech engine, complete with animated skull turrets, rotating gears, and glowing HUD-style meters. Character symbols return with more cyberpunk influence, and the scatter symbols are polished to reflect their game-changing potential. Despite the grid’s complexity, everything remains legible and slick.
It’s a seamless blend of futuristic aesthetics and Western grit—a style that began in Money Train 2 and has evolved into something worthy of a triple-A video game franchise.
Gameplay Mechanics
Money Train 4 employs a scatter pays mechanic on a 6×6 grid, meaning wins aren’t based on paylines but on landing clusters of identical symbols anywhere on the reels. Specifically:
8 high-pay symbols or 10 low-pay symbols trigger a win.
No wild symbol is present—an unusual choice, but one made up for by a wide range of features.
This cluster system adds a modern flair and creates space for huge symbol explosions and cascading respins. The core gameplay is structured around two main features: Respins and the Money Cart Bonus Round.
Respins Feature
This can randomly trigger after any spin. Here’s how it works:
The most common symbol on the grid becomes sticky.
All others fade, and a respin is awarded, potentially landing more matching symbols or multipliers.
Multiplier symbols (x values) increase the payout multiplier but do not stick.
The feature continues until no new matches land, at which point all sticky symbols and multipliers are combined into a final payout.
It’s a deceptively simple mechanic with a high ceiling, especially when triggered with high-paying characters or when multipliers flood the screen.
Sound and Music
Sonically, Money Train 4 might be the best in the franchise. The base game features a suspenseful ambient track that channels Western undertones with heavy electronic distortion. It evokes the feeling of standing on the edge of something massive—anticipation simmers in every twang of guitar and whisper of synth.
When the Money Cart Bonus Round begins, the atmosphere darkens and intensifies. The rain hammers harder, lightning flashes illuminate the grid, and the soundtrack becomes a dramatic, cinematic suite reminiscent of an action film finale.
Sound effects are finely tuned to react to symbol landings, especially the modifiers, which are announced with metallic screeches, gear clicks, and digital surges. Every win, no matter how small, feels significant thanks to the layered audio design.
Bonus Features
The highlight of the game is the Money Cart Bonus Round, Relax Gaming’s signature Hold & Win-style feature. This is where players can chase the legendary 150,000x max win.
Triggering the Bonus
Land 3 or more scatter symbols to trigger.
The game then switches to a new board: 6 reels, 4 rows, starting with 3 respins.
Bonus and Persistent Symbols stick and perform their action.
Each new symbol resets the spin count to 3.
When a full row is filled, a new row unlocks—up to 4 extra rows in total.
Modifier Symbols (Basic and Persistent)
The game includes an overwhelming range of symbols. Some highlights:
| Symbol | Effect |
| Bonus Symbols | Reveal values 1x–10x the bet. |
| Collector / Persistent Collector | Gathers all visible values to its own (each spin for Persistent). |
| Sniper / Persistent Sniper | Doubles 3–8 values, repeats each spin for Persistent. |
| Payer / Persistent Payer | Adds its value to all symbols (each spin if Persistent). |
| Adjacent Payer/Collector | Targets only adjacent symbols. |
| Collector-Payer | Adds collected values to itself and redistributes them. |
| Arms Dealer | Converts 1–4 symbols into modifiers. |
| Persistent Arms Dealer | Converts a symbol every spin. |
| Necromancer | Revives used modifiers. |
| Persistent Necromancer | Does the above every spin. |
| Persistent Shapeshifter | Becomes a new modifier every spin. |
| Unlocker | Unlocks locked rows. |
| Reset Plus | Increases respin count. |
| Upgrader | Upgrades 1–3 modifiers to Persistent versions. |
The interactions between these symbols can lead to jaw-dropping outcomes. For example, a Persistent Collector + Persistent Payer + Arms Dealer loop can quickly escalate to four-digit multipliers, especially if combined with row unlocks and sniper boosts.
Betting Options and Payouts
Money Train 4 offers a slightly more constrained bet range:
Minimum Bet: €0.10
Maximum Bet: €6.00
This narrower range reflects its astronomical payout ceiling. With volatility rated 5/5 and a Hit Frequency of 20.14%, the game sits firmly in high-risk territory. But the rewards can be equally towering.
RTP Options
Base RTP: 96.10%
Bonus Buy RTP: 96.50%
Bonus Buy Options
Two paths are available:
100x your bet to trigger the standard bonus round.
500x your bet to trigger it with 1 guaranteed Persistent Symbol.
These buy-in tiers provide strategic depth. Some players might chase a Persistent Shapeshifter early, while others may rely on natural triggers or build-up wins through base game Respins.
Maximum Win
The headline figure is eye-watering: 150,000x your stake, making this one of the most generous max win caps in any online slot. On a max €6 bet, that’s €900,000 in a single round.
Conclusion
Money Train 4 is the perfect finale to a franchise that has defined feature-rich, high-volatility slots over the past few years. Every entry has expanded the lore, gameplay, and mechanics, and the fourth installment takes that to its logical, chaotic extreme.
With slick visuals, AAA-style audio, superb mechanical depth, and a 150,000x top prize, this slot isn’t just a game—it’s an event. Whether you’re a long-time fan of the series or just discovering the franchise, this final ride is unmissable.
Relax Gaming has proven time and again that they understand what players want: thrill, variety, scale, and potential. Money Train 4 delivers all of that and more, pulling into the station not with a whimper, but with a final, glorious explosion.
