Relax Gaming Slots: Where to Play Money Train & More

By Jack Henshaw, Head Writer · Published 4 July 2026 · Last updated 9 July 2026

Relax Gaming is the Malta studio that spent a decade as gambling’s quiet plumber — building poker and bingo software for other people — then flipped a switch in 2019 and shipped Money Train, the loudest slot franchise of its era. Add the 99% RTP experiment Book of 99, the million-euro Dream Drop jackpot network and a berth inside France’s FDJ United, and you get our verdict: 8.5/10. This Relax Gaming review covers the best Relax Gaming slots ranked, the wildest max-win ladder in slots, and the full licence file.

Where to Play Relax Gaming Slots

Relax Gaming at a glance

The essentials — and note the bingo licence in the middle of the list, a fossil from the company Relax used to be.

✓ Facts checked against the UKGC business licence register and Relax Gaming’s published data — 4 July 2026

The best Relax Gaming slots: 10 games that actually matter

Two hundred games, ten places — and four of them are trains, because no franchise in modern slots has earned its dominance more plainly. RTPs quoted are headline defaults; the paytable check applies as always. The full ranked catalogue sits near the end of the page.

1. Money Train 2 (2020)

The perfected sequel and, for many, the best bonus round ever built: land three scatters and the reels vanish, replaced by a persistence grid where Collectors, Payers, Sniper and Necromancer symbols feed each other in loops that can spiral to the full 50,000x — a ceiling players have actually hit on camera (see biggest wins). The base game is merely the queue for the bonus, and everyone knows it. Published default 96.4%, streamer canon, all-timer status secure.

2. Money Train 4 (2023)

The current terminus: a cyber-heist reskin of the sacred engine with more modifier symbols than ever and the ladder’s top rung raised to a scarcely believable 150,000x — among the biggest advertised ceilings in slots. Published default 96.1%, volatility appropriately biblical, and proof the franchise can keep escalating without collapsing under its own arithmetic. The full 150,000x has been filmed; we’ve embedded it below.

3. Temple Tumble Megaways (2019)

Relax’s breakout wasn’t a train at all — it was a demolition job. Among the first slots built under Big Time Gaming’s Megaways licence by an external studio, Temple Tumble knocks blocks out of a crumbling temple until, with the whole grid cleared, the free spins open up. Its tumble-to-clear objective gave cascades a purpose beyond chaining wins, and its descendants (Templar Tumble, TNT Tumble, Cluster Tumble) form a whole family branch. Published default 96.25%, 7,767x cap.

4. Money Train 3 (2022)

The 100,000x instalment — the one that doubled the already-absurd MT2 ceiling and stuffed the persistence grid with new specials until every spin of the bonus felt like defusing a bomb. Some purists prefer MT2’s cleaner symbol set; nobody disputes that MT3 delivered the franchise’s midpoint escalation flawlessly. Published default 96.1%, and the bonus remains the point: the reels are just the ticket queue.

5. Book of 99 (2021)

The industry’s great maths statement: a Book-genre slot — expanding symbols, Greek-hero glamour — published at 99% RTP, the first mainstream slot to plant its flag that high. The house edge shrinks to a rounding error; in exchange the 5,000x cap is modest by Relax standards. For RTP-literate players it became an instant institution, and for this site’s whole documentation mission it’s the perfect exhibit: the same game, at 99%, only where the casino chose that build. Check the paytable — here more than anywhere.

6. Money Train (2019)

Where it all left the station: a dusty Western heist whose Money Cart bonus — the persistence grid, the Collector, the Payer — invented the engine three sequels have been escalating ever since. Its 20,000x ceiling looked outrageous in 2019 and quaint by 2023, which is the franchise’s whole story in one sentence. Published default 96.2%, and still the tightest, most legible version of the idea.

7. Hellcatraz (2020)

A pixel-art prison break through 46,656 ways, mystery symbols and a Super Free Spins mode with a 51,840x ceiling — Hellcatraz is Relax at its strangest and among its most beloved. The retro-arcade art hides one of the nastier variance profiles in the catalogue, and its cult following (plus a 2024 sequel) confirmed that the studio’s weird streak sells. Published default 96.46%.

8. Iron Bank (2021)

The Money Train engine’s sharper-suited cousin: a 1920s feline crime syndicate, sticky multiplier respins and a vault-cracking free-spins mode that borrows the franchise’s escalation logic without wearing its costume. Connoisseurs rate it among the studio’s best pure designs, and its noir-cat aesthetic is the art team’s coolest hour. Published default 96.35%, ceiling in the tens of thousands.

9. Snake Arena (2020)

The classic mobile game Snake, rebuilt as a slot: a serpent slithers across the grid during the bonus, growing a segment with every wild it eats, its whole body turning wild as it lengthens. It’s the catalogue’s purest example of Relax’s video-game literacy — a mechanic every player over thirty already knows how to root for — and the Dream Drop version later gave it a jackpot layer. Published default 96.3%.

10. Beast Mode (2022)

A neon gym full of bodybuilding animals, a lion in sunglasses, and an any-adjacent-pays grid where symbol upgrades and multiplying wilds stack through the free spins — Beast Mode is the studio’s sense of humour flexing hardest. Beneath the protein-shake comedy sits a properly volatile model with a five-figure ceiling, and its cult status among streamers was immediate. Published default 96.5%.

Relax Gaming vs the studios it competes with

Relax fights in the volatility division but brings two weapons nobody else on this table has: a jackpot network and an aggregation platform. Against our previously reviewed studios:

The honest read: Hacksaw ships faster, Push publishes friendlier defaults, Nolimit goes darker — but nobody else owns a bonus round with Money Train’s cultural weight, and nobody in this cohort runs a progressive jackpot network at all. Relax is the volatility studio that also does infrastructure, and that double identity — hit factory plus plumbing — is its real moat.

The game families, in depth

The catalogue organises itself into clear dynasties. The full ranked list covers the rest.

The Money Train line

Money Train (2019, 20,000x) → Money Train 2 (2020, 50,000x) → Money Train 3 (2022, 100,000x) → Money Train 4 (2023, 150,000x), plus the Money Cart spin-offs that sell the bonus round on its own and 2024’s Money Train Origins Dream Drop, which bolted the jackpot network onto the franchise. One engine, ever-taller ceilings — the most disciplined escalation programme in slots.

The Tumble family

Temple Tumble Megaways (2019) → TNT Tumble (2020) → Templar Tumble (2021) → Cluster Tumble (2021) → Temple Tumble 2 Dream Drop (2022) — the demolition wing, where clearing the board is the objective and the free spins are the reward for finishing the job. Built on the Megaways licence from Big Time Gaming, then increasingly on Relax’s own cascade engines.

The Dream Drop network

Launched May 2022: a five-tier progressive jackpot layer — Rapid, Midi, Maxi, Major, Mega — bolted onto a growing shelf of games (Snake Arena Dream Drop, Temple Tumble 2, Santa’s Stack and many more, including partner-studio titles). The Mega seeds at seven figures and has now paid out 30 times, the record being a €2.9 million hit from a 40-cent spin and the most recent a €1.87 million hit on Bonsai Dragon Blitz via bet365 in May 2026. It’s the only progressive network owned by any studio in our volatility cohort.

The oddities shelf

Hellcatraz and its 2024 sequel, Snake Arena, Beast Mode, Dead Man’s Trail, Top Dawg$ — the games where Relax’s video-game DNA runs loudest: pixel art, arcade mechanics, jokes with proper maths underneath. This shelf is why streamers treat the studio as appointment viewing between Train launches.

The high-RTP experiments

Book of 99 (99%) and Marching Legions (98.12%) — two deliberate outliers that made published RTP itself the game’s headline feature. No other tier-one studio has planted flags this high; both remain reference points in every serious RTP conversation, ours included.

Signature mechanics & technology

Relax’s toolkit blends slot design with systems engineering — the B2B heritage showing through:

The Money Train bonus engine

A respin-style persistence grid where every symbol is a character: Payers add value to neighbours, Collectors sweep the board, Snipers multiply random cells, Necromancers resurrect spent specials. Each new instalment adds roles and raises the ceiling. It’s effectively a tiny board game inside the slot — and the reason the franchise’s bonus rounds get streamed like sporting events.

Dream Drop progressive jackpots

Five tiers funded across the whole network, with the Mega seeding at a million euros and dropping, on the record so far, every few weeks somewhere in the world. Mechanically it’s a jackpot overlay compatible with many base games — including partner studios’ — which turns Relax’s aggregation reach into jackpot liquidity. Thirty Mega winners in four years is the proof of concept.

Demolition cascades

The Tumble family’s signature: cascades exist to clear the board, not just chain wins — a win condition borrowed from puzzle games that gives every spin a visible objective. Temple Tumble’s three-rows-of-blocks design remains the cleanest expression.

Megaways under licence

Relax was among the earliest external studios building on BTG’s variable-reel engine, and Temple Tumble remains one of the licence’s standout uses — proof the studio could take another house’s mechanic and make something unmistakably its own.

The aggregation platform

Silver Bullet and Powered By Relax distribute third-party studios — Print Studios, 4ThePlayer, Peter & Sons, ReelPlay, Storm Gaming, Leander Games, Games Inc and more — through Relax’s integrations and compliance stack. For players it means “Relax” in a lobby often fronts a whole ecosystem; for the studio it means revenue and market intel no pure content house enjoys. The B2B plumbing never went away; it just moved upstairs.

Platform-grade engineering

A decade of running other people’s poker networks left Relax with infrastructure discipline most slot studios never need: its games ship across hundreds of operators with certified builds per market, and the Dream Drop network settles seven-figure jackpots across borders. Boring excellence — the kind you only notice when it’s missing.

Relax Gaming slots RTP: the real numbers

The defaults: the working catalogue sits in the familiar mid-96s — Money Train 2 at 96.4%, Hellcatraz at 96.46%, Temple Tumble at 96.25% — solid, unremarkable, honest. The remarkable part lives at the edges: Book of 99 at 99% and Marching Legions at 98.12%, the two tallest RTP flags planted by any tier-one studio, and the reason maths-literate players keep a permanent soft spot for Relax.

The builds: the standing caveat, sharpened. Reduced configurations of Relax games circulate exactly as they do for NetEnt, Pragmatic and the rest — and the stakes are higher here, because Book of 99 at a reduced build is a different product entirely: the whole game is its number. Dream Drop titles also carry a jackpot contribution inside their published RTP, so the “same” figure buys a different distribution. Ten seconds in the paytable; no exceptions.

Volatility and ceilings: the Money Train ladder — 20,000x, 50,000x, 100,000x, 150,000x — is the tallest advertised in mainstream slots, and the bonus-or-nothing design concentrates nearly all of the value into rare events. Hellcatraz’s Super mode runs past 51,000x. These are drought machines with historic tails: stake accordingly, and keep our responsible gambling guide to hand.

From poker plumbing to the FDJ family

The arc that matters: a company that spent a decade invisible — running other people’s poker rooms — and then produced the most famous bonus round in slots within two years of trying. The B2B years weren’t a detour; they were the training montage.

The people who built Relax Gaming

Patrik Österåker & Jani Tekoniemi — co-founders

The pair founded Relax in March 2010 not to make slots but to engineer gambling systems for other companies — poker networks and bingo platforms, with Unibet the marquee client. That client relationship became destiny: Kindred (Unibet’s owner) took a stake in 2013, kept it for eight years, and eventually bought the whole company. The founders’ B2B instincts — reliability, integrations, compliance at scale — are still legible in everything from the Dream Drop settlement machinery to the aggregation platform.

The builder generation

The slots pivot was executed by a studio organisation spread across Malta, Estonia, Sweden and Serbia — roughly 240 people whose design culture mixes Nordic engineering with unapologetic video-game fandom (Snake Arena and Hellcatraz are love letters, not focus-group output). The Money Train engine’s character-symbol design has been imitated across the industry without ever quite being matched.

The Kindred and FDJ chapters

Kindred’s 2021 buyout (completed October, €320m valuation) gave Relax a listed parent; FDJ’s 2024 takeover of Kindred handed the keys onward to France’s former national lottery, now trading as FDJ United. Two ownership changes in three years, and the release calendar never blinked — the trains kept leaving on time, which tells you where the real power in the company sits: with the engine room.

Is Relax Gaming fair? Licensing, regulation & the record

Checked against the Gambling Commission’s business licence register on 4 July 2026.

The licences. Relax Gaming Ltd holds UKGC account 37462 with active remote casino (since November 2014), gambling software (2015) and bingo (2015) licences — over a decade of continuous UK regulation, plus sister entity Relax Gaming (Gibraltar) Ltd on account 57758 (software and game host, active since March 2021). A third entity, Relax Gaming Network Ltd, surrendered its licence in a 2020 group restructure — paperwork housekeeping, not enforcement. Verify all on the UKGC public register. Beyond Britain, Relax’s own site lists MGA licensing from the Malta headquarters, plus certification with the Gibraltar Gambling Commissioner, Romania’s ONJN, Ontario’s AGCO and eCOGRA’s independent RNG/fair-play testing — a wider regulated-market footprint than the UKGC file alone shows.

The record. Clean: no UKGC fine, penalty or licence review against any Relax entity that we can find across twelve years — and the company now answers upward to FDJ United, a group anchored by a former state lottery with compliance instincts to match. The Dream Drop network adds its own scrutiny: independently audited jackpot pools that have paid 30 Mega winners without public dispute.

So is it fair? Yes: certified RNG in every market, published figures for every game, an audited progressive network, and the industry’s two most generous published RTPs sitting in its own catalogue. The caveats are structural, not scandalous: builds vary by casino (and matter enormously on the high-RTP flagships), Dream Drop RTP includes the jackpot contribution, and bonus-or-nothing designs like Money Train concentrate value into rare events — volatile by design, and honest about it.

The biggest Relax Gaming wins

A studio with both a jackpot network and the tallest multiplier ladder in slots produces two kinds of record. Documented events only:

On tape: the 150,000x Money Train 4 event, and a full 50,000x on the sacred second instalment:

Videos embedded for illustration — the results shown are the players’ own, and most bonus rounds end well short of the ladder’s top rung.

Beyond the reels

The corners of the Relax story the ranking competitors never reach:

The invisible decade

Between 2010 and 2017, millions of people used Relax software without ever seeing the name — it ran poker rooms and bingo networks under other companies’ brands. The studio that later shipped slots’ flashiest bonus round spent its formative years optimising uptime for products it couldn’t sign. That anonymity bred the engineering culture everything since has stood on.

The other half of the business

Relax is the only studio in our tier-one queue that is also a major aggregator: Silver Bullet and Powered By Relax carry studios like Print Studios, 4ThePlayer, Peter & Sons and Air Dice into hundreds of operators. When the €2.9m record Dream Drop hit landed, it fell on a partner studio’s game — Relax’s network paying out on someone else’s slot. No rival on these pages can even construct that sentence. The aggregation ambitions now stretch across the Atlantic too: Relax launched RLX Gaming, a dedicated North American arm, in June 2026, debuting its US aggregation platform with ReelPlay as first partner — the same Silver Bullet playbook, applied to a market Relax’s European rivals are only starting to enter.

The train that left the station

Money Train’s bonus round now has its own economy: the Money Cart spin-offs sell the bonus with no base game at all — the anteroom demolished, the vault sold separately. And 2026’s Necromancer’s Gate borrows Money Train’s symbol lore for a new setting, the first sign the franchise is becoming a universe rather than a series.

Two owners, zero wobble

Sold to Kindred in 2021; passed to FDJ United when France’s lottery giant swallowed Kindred in 2024. Studios usually lose a beat — a delayed roadmap, an exodus, a quiet quality dip — somewhere in that much corporate weather. Relax shipped Money Train 4, scaled Dream Drop past twenty Mega winners and kept the release calendar intact straight through both handovers. The plumbing held.

New Relax Gaming slots: what’s launched for 2025–26

The state of Relax right now: franchise lore expanding, Dream Drop compounding, and the FDJ United era changing nothing visible. This section refreshes with every significant launch.

The big reveal: after Money Train 4 was marketed in 2023 as “The Last Stand” — explicitly billed as the franchise’s final instalment — Relax announced a U-turn on 8 June 2026: Money Train 5, confirmed for release on 24 September 2026. CEO Martin Stålros called it a sequel to “one of the best series ever made in slot history,” while Chief Product Officer Tony O’Mahony described the brief as evolving the engine into “something that feels deeper, more unpredictable, and ultimately more rewarding,” leaning harder into risk and volatility rather than playing it safe. The bonus round keeps its Money Cart core — 3+ Bonus Scatters still trigger it — but Relax says it now carries over 20 distinct special symbols, more than any previous instalment. RTP and the max-win ceiling haven’t been published yet; we’ll update the top-10 list and the maths section the moment they are.

Distribution kept pace with content: Relax took its full portfolio live with Starcasino in the Netherlands (July 2026) and launched RLX Gaming, its dedicated North American aggregation brand, with ReelPlay as first partner (June 2026) — see Beyond the reels for more on the US push. All ship with published figures where Relax has released them; Dream Drop titles fold the jackpot contribution into theirs. Paytable first, always.

What players actually say

From the forums and streamer chats where the Train is a calendar event — our words, cons intact.

The love: Money Train 2’s bonus is routinely named the best ever designed, and each sequel’s launch is treated like a festival; the maths crowd cherishes Book of 99 and Marching Legions as proof someone at a big studio respects them; the oddities shelf (Hellcatraz, Snake Arena, Beast Mode) earns real affection; and Dream Drop’s steady drumbeat of million-euro winners gives the network a lottery-ticket romance no fixed-maths rival can offer.

The gripes, plainly: the bonus-or-nothing design cuts hard both ways — base-game Money Train is openly described as a waiting room, and sessions without the trigger feel like paying rent on a locked door. Some feel the non-Train catalogue lives permanently in the franchise’s shadow, with solid releases ignored on arrival. Dream Drop’s jackpot contribution quietly thins the base experience for players who’ll never win it. And the 150,000x ceiling is, functionally, a poster: glorious, filmed, and about as reachable as the moon. All fair — and none of it empties the platform when a new Train is announced.

Which Relax Gaming slot should you play?

The thirty-second version of everything above:

Our verdict on Relax Gaming

All Slot Providers score: 8.5/10 — the engineer that learned to headline: slots’ best bonus engine, its only cohort-owned jackpot network, and the two tallest RTP flags in the industry.

Relax suits bonus hunters, max-win romantics, jackpot dreamers and RTP purists — a strange coalition no other studio serves simultaneously. Look elsewhere if you want the base game to be the show — Pragmatic’s scatter-pays or Play’n GO’s grids keep every spin alive — or gentler seas, where NetEnt’s classics remain the kind harbour. And wherever you board: the paytable states your build, and on Book of 99 that single check is worth two and a half percentage points.

Every Relax Gaming slot that matters, ranked

From a 200-plus catalogue, the 47 entries that matter, ranked by all-time greatness — craft, influence, maths and staying power blended. (NEW) marks 2025–26 releases. Re-ranked as the trains keep arriving.

Ranked 4 July 2026 from a catalogue of 200+ own-studio titles. Availability and RTP build vary by casino.

Relax Gaming Casinos in the UK

The Money Train line and Dream Drop network are fixtures across the UK market — including, naturally, the Kindred-heritage brands now under FDJ United. A cross-section of well-known UKGC-licensed Relax Gaming casinos carrying the studio’s catalogue (listed for information only — no commercial relationship, no endorsements; verify any operator on the Gambling Commission register before depositing):

Checked 4 July 2026. Game availability and RTP builds change — always confirm in the casino’s own lobby and the in-game paytable. 18+, please gamble responsibly.

Sources & Verification

Primary sources checked 4 July 2026, re-verified and expanded 9 July 2026: the Gambling Commission’s business licence register (accounts 37462 and 57758); Relax Gaming’s official site, including its About Us page and news archive for the Money Train 5 announcement, the Dream Drop Mega record and recent releases; individual game information screens for RTP, ceiling and mechanic data on every title in the ranked list; ownership history from Kindred Group and FDJ United’s own announcements. Imagery from official promotional assets and documented gameplay. Spotted an error? Tell us — corrections are actioned as a priority.

✓ Updated 9 July 2026: added the Money Train 5 announcement (CEO Martin Stålros and CPO Tony O’Mahony quoted, launching 24 September 2026) to the new-releases section, updated the Dream Drop Mega jackpot count from 27 to 30 winners (Bonsai Dragon Blitz’s €1.87m hit on bet365, 19 May 2026), corrected the staff count against Relax Gaming’s own published figure of 300+ across eight offices, added current CEO detail to the quick facts, added the RLX Gaming North American aggregation brand and named certifications beyond the UKGC file (eCOGRA, Gibraltar Gambling Commissioner, ONJN Romania, AGCO Canada), added a pros/cons verdict block with matching Review schema, added a UK-availability FAQ, and moved the on-page navigation up under the ads module.

Relax Gaming FAQs

Who owns Relax Gaming?

Kindred Group bought Relax outright in October 2021 (a €320m valuation), and Kindred itself was acquired by France’s FDJ in 2024 — so Relax now sits inside the FDJ United group. Founders Patrik Österåker and Jani Tekoniemi started the company in March 2010.

Is Relax Gaming fair, or are its games rigged?

Relax carries over a decade of UK licensing (accounts 37462 and 57758) with no enforcement action, certified RNG in every regulated market, an independently audited jackpot network with 30 documented Mega winners, and the industry’s two most generous published RTPs in its own catalogue. Builds vary by casino — the paytable states yours.

What is the best Relax Gaming slot?

Money Train 2 is the canonical answer — its bonus round is routinely called the best ever designed. Money Train 4 has the tallest ceiling, and Temple Tumble Megaways is the essential non-Train pick. Our full ranked ten, with reasoning, is above.

What is the Money Train max win?

The ladder runs 20,000x (Money Train), 50,000x (MT2), 100,000x (MT3) and 150,000x (MT4) — the tallest advertised ceiling in mainstream slots, and both the MT2 and MT4 maximums have been hit on camera.

Is Book of 99 really 99% RTP?

The headline build publishes 99% — the highest of any mainstream slot — but reduced configurations exist, and casinos choose per game. On this slot above all, check the in-game paytable before playing.

What is Dream Drop?

Relax’s five-tier progressive jackpot network, launched May 2022 — Rapid, Midi, Maxi, Major and Mega tiers funded across every connected game, including partner studios’ titles. The Mega seeds at seven figures and has paid out 30 times, the record being €2.9 million from a 40-cent spin.

What was Relax Gaming before it made slots?

A B2B poker and bingo supplier — from 2010 it engineered gambling platforms for other brands, most notably Unibet’s poker network. The slots pivot came around 2017; Money Train arrived two years later.

What is Silver Bullet?

Relax’s partner programme: third-party studios such as Print Studios, 4ThePlayer and Peter & Sons distribute their games through Relax’s platform, integrations and compliance stack. It makes Relax both a studio and one of the industry’s bigger aggregators.

Are Money Cart games the same as Money Train?

They’re the Money Train bonus round sold as standalone games — no base reels, straight to the persistence grid. Availability differs by market, so check your casino’s lobby.

What are the newest Relax Gaming slots?

2026 has brought Guitar Quest, World Class Kick Off Dream Drop and Necromancer’s Gate — the last extending Money Train’s symbol lore beyond the franchise — plus the announcement of Money Train 5 for release on 24 September 2026. Full slate in our new releases section.

Where can I play Relax Gaming slots in the UK?

Relax’s catalogue is carried by numerous UKGC-licensed operators, including Kindred-heritage brands such as Unibet and 32Red, plus Videoslots, Casumo, LeoVegas, PlayOJO and bet365 Casino — where a 2026 Dream Drop Mega actually landed. See our full casinos section above for the detail, and always verify any operator on the Gambling Commission register before depositing.