666 Casino

Last Updated on 30 May 2025 by Xavier C

666 Casino UK Review 2025

With its devilish branding and fire-themed visuals, 666 Casino brings a unique twist to the UK online casino scene. Established in 2017 and operated in the UK by AG Communications Limited, it’s licensed by both the UK Gambling Commission and Malta Gaming Authority, it’s a secure platform backed by an experienced operator.

Despite the cheeky aesthetic, this is a legitimate and serious online casino that offers a very strong catalogue of slots, table games, and live dealer titles.

I spent a week testing the site, digging into the game selection, bonuses, support, and overall usability. In this review, I’ll share everything I found – including the good and the not-so-good.

Bonuses and Promotions

The welcome offer at 666 Casino is split across your first two deposits. When you deposit between £20 and £66 for the first time, you’ll get a 100% match bonus. This comes with a 35x wagering requirement and must be completed within 21 days. If you’re a slot player, this bonus will stretch nicely as most slot games contribute 100% towards the requirement.

When you make your second deposit (minimum £20), you’ll receive 66 free spins on Big Bass Bonanza. Winnings are capped at £100, and spins must be used within 24 hours. It’s not a huge value offer but a decent follow-up to your initial deposit bonus.

Ongoing promotions include seasonal prize drops, game-specific boosts, and the Daily Spin Frenzy, where you can earn bonus spins by wagering £100 or more in a day. While promotions are less frequent than on some sites, they’re clearly laid out and easy to understand.

Homepage and Navigation

Despite the bold theme, the 666 Casino homepage is well organised, although the website design is a little dated. The red-and-black visuals are memorable, and more importantly, the interface is user-friendly (and simple). Game categories are separated logically, although I couldn’t find a way to filter by software provider or game type on desktop.

There’s also a very handy search function if you’re hunting for something specific. All key information like T&Cs, bonus policy, payment info and game rules is accessible at the bottom of the page, with good readability on both desktop and mobile.

Mobile Optimisation

There’s now a dedicated iOS and Android app available (launched in 2024), but most players will be fine just using the mobile browser site. It’s fully responsive, with virtually the same functionality as the desktop version. I tested several slots and live games across devices and didn’t run into any performance issues.

Games Selection

With over 2700 games (although the website claims 1500), more than 150 live dealer games, and dozens of table game options, 666 Casino offers one of the largest and most diverse game lobbies I’ve seen.

Online Slots:

The slots lobby is packed with around 2,600 slot games. With contributions from more than 40 developers – including NetEnt, Yggdrasil, Pragmatic Play, and Play’n GO – there’s massive variety. You’ll find everything from Book of Dead and Gonzo’s Quest to newer titles like Gates of Olympus and Fire Archer.

There are 38 progressive jackpots listed, although you won’t find Mega Moolah or WowPot games here. Instead, Blueprint Gaming’s Jackpot King series covers the big win potential with popular titles like Genie Jackpots and The Goonies.

Classic Casino Games:

Table game fans can take their pick from 56 blackjack titles, 34 roulette options, and over 20 versions of baccarat. There’s also a single video poker game and Casino Hold’em. While it’s not the most extensive virtual table collection out there, it covers all the key variants.

Navigation is easy thanks to filters, and games load quickly both on desktop and mobile. However, there’s no standalone lobby for table games which might make discovery a bit trickier for newer players.

Live Casino Games & Exclusives:

There are over 150 live dealer games at 666 Casino from Evolution, Pragmatic Play Live, Ezugi, and Skywind Group. I enjoyed high-quality streams and reliable table availability around the clock. Options include blackjack, roulette, baccarat, poker and a great line-up of game shows like Crazy Time, Lightning Dice, and Monopoly Live.

I was impressed by how quickly games loaded and how stable the streams were. Dealers were professional and chat was active but not distracting. If live casino is your thing, 666 has a very strong offering.

666 Casino UK Games Available Summary:

Security and Regulation

Licensed by both the UK Gambling Commission and the Malta Gaming Authority, 666 Casino is a safe place to play. The site uses 128-bit SSL encryption to protect data and payments, and all games are fairness-tested by independent labs.

The brand is operated in the UK by AG Communications Ltd, part of Aspire Global, who also run other respected sites like PlayFrank and Mr Play. Aspire Global was acquired by NeoGames in 2022 and continues to thrive.

Payment and Withdrawal Options

Deposit and withdrawal options are a bit limited compared to other UK casinos. You’ll find Apple Pay, Visa, Trustly, and a few e-wallets, but there’s no Google Pay. Minimum deposit is £10 (unconfirmed on-site but widely reported), and deposits are processed instantly.

Withdrawals can take up to six business days, depending on your chosen method. I liked that there’s a detailed spreadsheet explaining each method’s processing time, linked in the footer under ‘Deposit Methods’. Still, cashouts could be faster in 2025, especially compared to newer casinos offering same-day withdrawals.

Customer Support

Support is available via live chat daily from 08:00 CET to 00:00 CET for registered users. If you’re not signed in, the FAQ section is your first port of call, or you can use the contact form or email option for queries.

When I tested live chat, the response time was under five minutes, and the agent was helpful and polite. I would prefer longer support hours and a visible email address, but overall it does the job for standard questions and account help.

666 Casino Review – Final Thoughts

666 Casino is far more than just a gimmicky brand name. It delivers where it matters – game variety, slots quality, and live casino depth. The two-part welcome package is solid, and there’s enough ongoing promotional activity to keep things interesting without being overwhelming.

There are definitely areas for improvement. Faster withdrawals, more payment options, and a better filtered table game lobby would elevate the experience even more. But overall, I enjoyed my time playing here and found it to be a secure and expansive casino for UK players in 2025, especially if you’re looking for a fun twist on the typical online offerings.

666 Casino Review Summary