Money Train 4 (Relax Gaming) Slot Review

Money Train 4: Slot Overview

Money Train 4 is the final installment in the popular Money Train series from Relax Gaming, released on September 20, 2023. This high-volatility video slot blends a steampunk aesthetic with Western themes, featuring a futuristic train amid a battle between robots and humans. It employs a scatter pays mechanic on a 6×6 grid, where wins form by landing 8 or more identical highest-paying symbols anywhere on the reels. With a default RTP of 96.1%, high volatility, and a staggering 150,000x max win potential, it targets experienced players seeking adrenaline-fueled sessions with rare but massive payouts. The base game offers straightforward spins enhanced by occasional respins, leading into the explosive Money Cart Bonus Round, which expands the grid up to 6×8 and introduces a vast array of special symbols.

Design and Graphics

The visuals in Money Train 4 masterfully fuse steampunk and Western motifs, centering on an upgraded futuristic steam locomotive that evolves from the series’ origins. To the right of the reels, an impaled robot underscores the ongoing human-robot conflict, adding thematic tension. The 6×6 grid is framed by metallic panels and glowing accents, with crisp, detailed artwork that immerses players in a high-tech saloon-like environment. Animations are fluid and impactful: winning symbols pulse with energy, multipliers explode on collection, and bonus activations trigger dramatic train whistle sounds paired with a rich, atmospheric soundtrack that builds intensity during features.

Money Train 4 slot – base game

Symbols reflect the theme effectively. Low-paying icons are classic card suits—diamonds, clubs, hearts, and spades—in metallic hues, requiring 10+ for a win (0.4x to 0.5x the bet at minimum, up to 100x-125x at 36 symbols). Medium payers feature a blue-clad woman and green-attired man (1x-1.2x at 10 symbols, 250x-400x at 36). Premium symbols include an orange-robed figure and red sheriff (1x-1.2x at 8 symbols, 500x-1000x at 36). The golden BONUS scatter, marked with bold lettering, stands out prominently. The design is optimized for desktops, tablets, and mobiles, maintaining sharp quality across devices without compromising the immersive, cinematic feel.

Gameplay Mechanics

Money Train 4 utilizes a 6-reel, 6-row grid with no traditional paylines, instead relying on the scatter pays system: wins trigger from 8+ identical highest-paying symbols (10+ for others) landing anywhere. The base game flows simply—select bets from €0.10 to €6, spin, and watch symbols tumble into position. A 20.14% hit frequency ensures moderate action, with payouts calculated based on symbol counts. Special to the base game is the random Respin feature, which activates post-spin by locking the most frequent symbol type. Remaining positions respin exclusively for that symbol, blanks, or multipliers (which collect and apply at the end). Respins continue until the grid fills with the locked symbol or only blanks land, delivering enhanced wins via the accumulated multiplier.

Standard symbols pay as follows:

The BONUS scatter (3+) triggers the main event, locking with 1x-10x values for the Money Cart Bonus Round.

Bonus Features

The Money Cart Bonus Round activates with 3+ BONUS scatters, locking them with 1x-10x values and granting 3 respins (resetting to 3 on any symbol land). Symbols lock in place; filling a row adds one (up to 4 times, reaching 6×8). Special symbols activate top-to-bottom, left-to-right. Bonus frequency: 1 in 387.4 spins; Sticky Respins: 1 in 25.4 spins.

Money Train 4 slot – free spins

Key bonus symbols include:

The Bonus Buy offers direct access: €100x (standard) or €500x (guaranteed persistent symbol).

Betting Options and Payouts

Bets range from €0.10 to €6, accommodating casual and mid-stakes players. The default RTP 96.1% can drop to 94% or 90% at operator discretion. High volatility pairs with a 20.14% hit frequency, bonus round every 387.4 spins, and 150,000x max win (probability: 1 in 94 million spins). Payouts scale exponentially with symbol counts, favoring bonus rounds where average wins hit 96.5x the bet. The Respin feature boosts base game potential via multipliers.

Money Train 4 slot – bonus buy

Conclusion

Money Train 4 excels with its refined scatter pays base game, innovative Respin feature, and the pinnacle Money Cart Bonus Round boasting over 20 interactive symbols, including new additions like Upgrader and Arms Dealer, enabling grid expansion to 6×8 and unpredictable, high-reward combos. The steampunk-Western design, immersive audio, and mobile optimization enhance engagement, while the 96.1% RTP and 150,000x max win appeal to volatility enthusiasts. Drawbacks include a capped €6 max bet limiting high-rollers, operator-adjustable lower RTPs, and extreme rarity of the top prize (1 in 94 million spins), leading to prolonged dry spells despite a solid 20.14% hit rate. Players can test the slot risk-free using the built-in demo available on this page. Overall, it capably concludes the series as a technically superior, feature-rich powerhouse for bonus chasers, balancing innovation with proven mechanics.