Monster Casino Sister Sites: the ProgressPlay Network Explained
Monster Casino’s sister sites include Mr Vegas, Dazzle Casino, Mr Slot, GatoBet, AcedBet, 21Bets, QuidSlots and Slot Lux, and every one of them is run by ProgressPlay Limited on the same UK Gambling Commission licence (no. 39335). What they share is that licence, the ProgressPlay platform underneath and broadly the same bonus rules; what tells them apart is the game range, the theme and which extra each one leans into, whether that’s a live casino, a built in sportsbook or a wall of scratchcards. Monster Casino holds UK Gambling Commission account 39335.
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The ProgressPlay Sister Sites in Full
Reviewed by Mike WilsonPublished: May 2020
A quick note on what counts. Monster doesn’t market an “official” family of its own, so on this page a sister site means what most UK searchers mean by it: another casino run by the same operator on the same licence. That’s ProgressPlay Limited and UKGC licence 39335. You can check any pairing yourself by reading the operator name in a site’s footer and the licence number on the Gambling Commission register.
How These Sister Sites Work
ProgressPlay is mainly a business to business platform that also runs its own casinos and powers white label partners. The licensed entity is ProgressPlay Limited, head office on the UKGC register at Kolonakiou 26, Limassol, Cyprus, and it also holds a Malta Gaming Authority licence (MGA/B2C/231/2012). Because the brands sit on one licence and one platform, they share the same terms, the same KYC and verification flow, and, being UKGC sites, the same GamStop self exclusion. That is why they feel so alike. The practical upside is consistency and safety; the downside is that switching brand rarely changes much beyond the theme.
Best ProgressPlay Sister Sites at a Glance
- Best overall: Mr Vegas, the biggest and best presented brand in the group.
- Best for casino and sport together: GatoBet, which bolts a sportsbook onto the slots.
- Best for a glossy, live dealer feel: Slot Lux.
- Best stripped back, slots first option: Mr Slot.
- Best for weekly offers and a bit of colour: 21Bets.
- Best clean, no fuss layout: AcedBet.
The ProgressPlay Brands Compared
| Sister site | Status | UKGC licence | Best for | Welcome offer (always check) | Compared to Monster |
|---|---|---|---|---|---|
| Mr Vegas | Active | UKGC #39335 | All round flagship | Large matched deposit plus spins | Bigger live casino, slicker design |
| Dazzle Casino | Active | UKGC #39335 | Flashy slot play | Deposit match plus spins | Glitzier skin, same engine |
| Mr Slot | Active | UKGC #39335 | Pure slots | Match plus spins on Starburst | Leaner library, fewer extras |
| GatoBet | Active | UKGC #39335 | Casino plus betting | Casino or sports welcome | Adds a sportsbook Monster also has |
| AcedBet | Active | UKGC #39335 | Clean, simple play | Standard match plus spins | Tidier layout, fewer gimmicks |
| 21Bets | Active | UKGC #39335 | Weekly promos | Match plus spins | More colour, similar games |
| QuidSlots | Active | UKGC #39335 | Slot fans on a budget | Match plus reload offers | Slot heavy, thin on tables |
| Slot Lux | Active | UKGC #39335 | Live dealer glamour | Match plus spins | Strong live tables, glossier look |
Mr Vegas Casino
Mr Vegas is the brand most people land on first, and for good reason. It carries the widest library in the group, well past a thousand titles, with the strongest live dealer lobby of the lot powered by the usual studio names. Run by ProgressPlay on licence 39335, it takes the standard matched deposit plus free spins welcome, and the bonus wagering now sits under the 10x UK cap like every brand here. The neon Vegas styling is more polished than its cousins and it doesn’t feel as cookie cutter.
Versus Monster: same operator, same platform, but Mr Vegas gives you more games, a better live section and a livelier interface. If Monster feels a little flat to you, this is the upgrade.
Dazzle Casino
Glittery branding, a heavy lean on slots and deposit matches that read generously on the page, that’s Dazzle in a sentence. It sits on the same UKGC 39335 licence and the same payment rails, so deposits, KYC and self exclusion behave exactly as they do on Monster. Live directories now show its bonus playthrough at 10x, in line with the current rules.
Versus Monster: think of it as the same machine in a flashier case. The look is busier, the games list is comparable, and the differences come down to taste rather than substance.
Mr Slot
Mr Slot keeps it deliberate and narrow: slots first, a small table section, and a plain layout that loads fast. The welcome is a match plus spins on Starburst, with the £20 minimum deposit and 10x wagering you’ll see across ProgressPlay. It’s lighter on content than Monster and short on the sportsbook side.
Versus Monster: fewer games and no betting, but if you only spin reels the stripped back feel is arguably easier to live with.
GatoBet
GatoBet is the one to look at if you like a flutter on the football as well as a spin. It pairs the ProgressPlay casino with a sportsbook covering the main markets, all on licence 39335. The identity can feel a bit split between the two halves, but the dual offer is real and the casino side carries the familiar slot and live dealer mix.
Versus Monster: closest in spirit, since Monster also runs casino and sport together. GatoBet just puts the betting front and centre.
AcedBet
AcedBet is the clean one. The layout is uncluttered on phone or laptop, slots lead with a sensible Megaways and classic mix, and the table area covers the basics without sprawl. Same operator, same 39335 licence, same chat and email support that can lag at peak times. A small loyalty ladder adds a few perks for regulars.
Versus Monster: less going on, which is the point. No sportsbook, but a tidier, calmer place to play the same games.
21Bets
21Bets leans on a weekly rhythm of offers, deposit days and loyalty point days, wrapped in a colourful but readable layout. The game list is a broad slots and live mix, and as a ProgressPlay brand on the same licence the security, banking and bonus structure mirror Monster’s.
Versus Monster: more frequent promos and a brighter skin, much the same games underneath.
QuidSlots
The cheeky, penny pinching name tells you the focus: rows of slots from a wide spread of providers, a handful of tables, and an easy to use design that doesn’t chase glamour. Welcome and reload offers are there, with the same 10x capped wagering that now applies group wide.
Versus Monster: a slot heavy, lighthearted alternative; thinner on table games and with no betting.
Slot Lux
Slot Lux goes for glamour, with polished menus, a Vegas sparkle and a live dealer section that is one of the better presented in the family. Stacks of slots, smooth on mobile, and the usual ProgressPlay licensing and payments behind it.
Versus Monster: glossier and stronger on live tables, though under the sheen it is still the same slot first platform.
The Complete ProgressPlay Brand List
The network is far bigger than the brands reviewed above. Beyond the owned ProgressPlay names, the platform powers a long list of white label casinos that wear a partner’s branding but sit on the same licence, alongside regional and bingo led sites. Other live ProgressPlay brands include UK Slots, Anytime Casino, Scorching Slots, Mobile Slots, Mobile Millions, Glimmer Casino, Quartz Casino, Sunny Casino, Lottozone, Casino Kings, Fruity King, Las Vegas Casino and Mr Jack Vegas. The exact roster shifts as brands open and close, and older affiliate lists still name sites that have since been retired, so treat any list as a snapshot and check the operator’s entry on the Gambling Commission register for the current domains under licence 39335.
What’s the Same and What’s Different
| Feature | Monster Casino | Sister sites |
|---|---|---|
| Operator | ProgressPlay Limited | ProgressPlay Limited (all) |
| UKGC licence | #39335 | #39335 (shared) |
| Signature bonus and wagering | Matched deposit plus spins, wagering capped at 10x | Same structure, same 10x cap |
| Loyalty / cashback | Missions ladder plus weekly cashback | Similar ladders, varies by brand |
| Game library | Large, slots plus live plus scratchcards | Ranges from lean (Mr Slot) to large (Mr Vegas) |
| Bingo | No dedicated bingo | Some group sites add bingo |
| GamStop | Yes, covered | Yes, all UKGC brands covered |
| Design | Mobile first, fairly plain | Mostly reskins of the same template |
Are These Official Sister Sites?
It helps to split the field into three. First, brands ProgressPlay owns and runs itself, such as Mr Vegas, Mr Slot and Dazzle. Second, white label casinos that carry someone else’s branding but run on ProgressPlay’s platform under the same 39335 licence; these are still the same operator in every way that matters to a player. Third, unrelated casinos that simply look similar or get lumped in by old lists. The first two are genuine sisters of Monster. The third group is not, and that is the distinction this page sticks to.
Monster Casino Review
Monster has been around since 2017 and it’s very much a mobile first casino, the sort of place you open for a quick spin on the phone rather than a long session at a desk. There’s a big slot library, a solid Evolution powered live casino, a decent run of scratchcards and a sportsbook tucked in, which is less common than you’d think. I’ve had a proper look around, and the short version is that it’s a legitimate, well licensed casino with two real drags: slow payouts and a withdrawal fee. Here’s the detail.
Welcome Offer and Promotions
New players get a headline 100%% match up to £1,000 plus 100 free spins, released over the first few deposits rather than in one go. The big change to flag for 2026: the UK Gambling Commission capped bonus wagering at 10 times from 19 January 2026, so the 50x playthrough that older reviews quote no longer applies to a UKGC brand like this. Wagering on the welcome bonus is now capped at 10x in line with that rule, which makes the package far more realistic than it once was. Always read the live terms before opting in, since the exact deposit split and game weighting can still vary. After the welcome, there’s a missions ladder, weekly cashback and themed day offers; the cashback is the pick of them for a regular.
Games and Providers
The library is broad rather than cutting edge. You get the familiar headliners like Starburst, Book of Dead and Gonzo’s Quest, a scattering of progressive jackpots, and live blackjack, roulette and baccarat run by Evolution with real dealers. The scratchcard range is a genuine niche, there are dozens of them, more than most rivals bother with. The one gripe is that the newest releases can be slow to land, so day one slot hunters may be left waiting.
Payments and Withdrawals
Depositing is quick and standard: Visa, Mastercard, PayPal, Skrill, Neteller, Trustly and a pay by phone option. That part is instant. Cashing out is where it sags. Requests sit pending for around a day, then take three to five working days depending on method, and there’s a flat £2.50 withdrawal fee each time, which stings on a small payout. KYC can also run long, with ID checks reported at five to seven days. Get verified early and it goes more smoothly.
Support, Licensing and Safer Gambling
Support is live chat and email, both meant to be round the clock, with no phone line. On licensing, Monster holds UKGC licence 39335 and an MGA licence through ProgressPlay, and it’s on GamStop, so a self exclusion through the scheme blocks access here too. Being honest about the operator matters on a page like this: in August 2025 the Gambling Commission fined ProgressPlay £1m for anti money laundering and social responsibility failings, added a formal warning and ordered an independent third party audit. That followed an earlier £175,718 settlement in 2022 for similar issues. The licence stands and player funds are protected, but it’s a repeat offender on compliance, and you deserve to know that before you sign up.
Mobile Experience
This is Monster’s strongest suit. It’s built for the phone first, the lobby loads cleanly, and play runs through the mobile browser without a dedicated app getting in the way. If you mostly game on a handset, it holds up well.
How It Compares to Its Sister Sites
Against the rest of the ProgressPlay family, Monster sits in the upper middle. It’s better than the lean brands like Mr Slot and busier than the plain ones, but Mr Vegas beats it on game count, live tables and polish. The sportsbook is a point in Monster’s favour over slot only siblings.
Key Facts
Operator details last reviewed: June 2026 (last updated 4 June 2026)
| Operator: | ProgressPlay Limited |
| Parent / group: | ProgressPlay Limited (B2B platform and operator) |
| Platform / network: | ProgressPlay white label platform |
| Licence(s): | UKGC (#39335); MGA (MGA/B2C/231/2012) |
| Established: | 2017 |
| GamStop: | Yes, covered (UKGC licence) |
| Sister sites: | Dozens of ProgressPlay brands; 8 reviewed in full above |
| Game providers: | Evolution (live), NetEnt, Play’n GO, Games Global and more |
| Payments: | Visa, Mastercard, PayPal, Skrill, Neteller, Trustly, pay by phone |
| Min deposit / withdrawal: | £10 / £10 |
| Withdrawal time: | ~1 day pending, then 3 to 5 working days; £2.50 fee |
| Support: | Live chat and email, no phone |
| Our rating: | 5/10 |
Pros and Cons
Pros
- One of the few ProgressPlay brands pairing a full casino with an integrated sportsbook on a single balance.
- Mobile first build that loads fast and plays cleanly on a phone, no clunky app needed.
- Unusually deep scratchcard range, dozens of them, which most rivals skip.
- Upfront KYC means once you’re verified the payout isn’t held up by a last minute ID request.
- New 10x wagering cap makes the welcome bonus far more achievable than the old 50x terms.
Cons
- Withdrawals are slow, roughly a day pending then three to five working days by method.
- A flat £2.50 fee on every withdrawal, which is painful on small cashouts.
- Operator ProgressPlay was fined £1m by the UKGC in August 2025 for AML and safer gambling failings, a repeat issue.
- No phone support, and live chat can be slow late at night.
- Public feedback is weak, with a Trustpilot score around 1.4 out of 5, mostly about payout speed.
- The site is largely a reskin of the same ProgressPlay template, so it lacks a strong identity of its own.
Frequently Asked Questions
Who owns Monster Casino?
Monster Casino is owned and run by ProgressPlay Limited, a Cyprus headquartered operator that holds UK Gambling Commission licence 39335 and a Malta Gaming Authority licence. ProgressPlay also powers more than a hundred other casino and betting brands.
What are Monster Casino’s sister sites?
They’re the other casinos on the same ProgressPlay licence, including Mr Vegas, Dazzle Casino, Mr Slot, GatoBet, AcedBet, 21Bets, QuidSlots and Slot Lux, plus a wider list of owned and white label brands.
Are Monster Casino sister sites on GamStop?
Yes. Every casino on UKGC licence 39335 is covered by GamStop, so if you self exclude through the scheme it applies across Monster and all of its ProgressPlay sisters.
What is the best Monster Casino sister site?
Mr Vegas is the strongest pick. It has the largest game library in the group and the best live dealer section, with a more polished feel than Monster while running on the same licence and platform.
Is the welcome bonus wagering really capped now?
Yes. From 19 January 2026 the UK Gambling Commission capped bonus wagering at 10 times for all UKGC licensed operators, so any current Monster or sister site bonus is limited to 10x, not the 50x or 65x that older reviews quote. Always confirm the live terms on site.
Is Mr Vegas a Monster Casino sister site?
Yes. Mr Vegas is one of ProgressPlay’s own brands on the same UKGC licence 39335 as Monster, so it is a genuine sister site rather than just a lookalike.
Are GatoBet and Monster Casino sister sites?
Yes. GatoBet runs on the same ProgressPlay platform and the same 39335 licence, pairing the casino with a sportsbook. It is a real sister site, with the betting side pushed more to the front than on Monster.
Why was ProgressPlay fined by the Gambling Commission?
In August 2025 the UKGC fined ProgressPlay £1m for anti money laundering and social responsibility failings found in a licence review, added a formal warning and required an independent audit. It followed a £175,718 settlement in 2022 for similar issues. The licence remains valid.
How fast are withdrawals?
Expect roughly a day in pending, then three to five working days depending on the method, with a flat £2.50 fee each time. Verifying your ID early helps avoid extra delay.
Our Verdict on Monster Casino
Monster is a legitimate, mobile first UKGC casino with a broad library and the handy twist of a built in sportsbook, but slow withdrawals, a per cashout fee and its operator’s repeat compliance fines hold it back. It’s for casual phone players who value casino and sport in one place, and not for anyone who wants same day payouts. Of the Monster Casino sister sites, Mr Vegas is the one I’d point you to, since it keeps the same licence and safety but adds more games, better live tables and a sharper feel.
CasinoSisterSite rating: 5/10