666 Casino Review (2025) - Daily Free Spins Promotions

Launched in 2017, 666 Casino has caught the eye with its bold red-and-black design and cheeky 'Relight Your Fire' branding.

Built around a fiery, tongue-in-cheek theme, it delivers a premium mix of slots, table games and live dealer tables from some of the industry's leading providers.

In this review, I will take you through everything this site has to offer - highlighting both the strengths and the weaknesses.

666 Casino is operated by AG Communications, who also runs other UK casinos like Mr Play and Slotzo.

They operate under a UK Gambling Commission licence - licence no. 39483

The casino welcome bonus at 666 Casino is true to the site’s name, with new players receiving up to £66 in a deposit-match bonus and 66 free spins. 

666 Casino Promo Code

You don’t need a 666 Casino bonus code to claim the offer. 

How it Works

• Deposit at least £20
• Receive your 100% deposit-match bonus worth up to £66
• Bonus funds will expire after 21 days
• You will also receive 66 free spins for Big Bass Bonanza
• These are valued at £0.10 each and will expire after 24 hours
• The maximum amount you can win from the free spins is £100

Wagering Requirements

This double welcome bonus comes with 35x wagering requirements attached.

Different games contribute differently towards this wagering - with all live casino games excluded. I would advise checking the list on their site before you claim the bonus.

Is the 666 Casino Bonus Worth It?

This unique '66' themed welcome bonus is a great way for new players to get started.

While there are probably more generous deposit bonuses elsewhere, this gives players a good chance to test out this casino.

The 35x wagering is pretty much bang on the industry average - which means that converting this bonus into real cash is a real possibility.

Key Benefits:

✔️ Flexible Double Welcome Bonus - Double welcome bonuses are a great way to test out a new casino

✔️ Top Slot Free Spins - The free spins are to be played on Big Bass Bonanza, which is one of the most popular slot games on the UK market

✔️ Generous Maximum Win - The £100 limit attached to the free spins component of the bonus is quite generous when compared to other casino sites

Who is This Bonus Best For?

✔️ This versatile double welcome bonus is well-suited to any sort of casino player as the bonuses can be used both on slots and classic casino table games

666 Casino offers lots of different promos for regular players. 

You can come back every day to take part in the Daily Spin Frenzy Challenge to bag up to 50 free spins, plus there are tournaments and leaderboards that run in conjunction with the software providers. 

666 Casino has a Rewards program, but at the moment it’s not open to UK players, so I’m hoping it will be expanded at some point in the future. 

You might prefer to stick to simple deposit and withdrawal methods like Visa and Mastercard (or Apple Pay if you’re on an iOS mobile device), but 666 Casino also has other options like PayPal, MuchBetter, Trustly, paysafecard and Skrill.

All deposits are instant and most withdrawals are too, but it’s a good idea to allow up to two days for e-wallets and up to six days for bank card payments.

I followed the full 666 casino login process as part of my review, right from the sign up stage. Once I’d entered my information, I could navigate around the site and see all of the games, but I couldn’t actually deposit until I had submitted my documents. 

Whenever you sign up at a new online casino, you should expect to be asked to verify your account. This is part of licensing and it’s actually a good thing, because it ensures you stay safe. 

I noticed that there’s an option to upload documents directly, so you don’t have to get in touch with support to do it. 

It won’t take more than 48 hours for your documents to be verified, but in my experience it’s usually much quicker at other casino sites. 

666 Casino offers an impressive games library of 2.000+ casino games.

Focus on New Slot Releases

666 Casino claims to add 40-50 new casino games to their site each month. 

With this sort of commitment, you can be assured that any brand-new best online slots will be available at this casino.

Plenty of Jackpot King Jackpot Slots

Jackpot King has played a major role in the growing popularity of jackpot slots among UK players, and you'll find a good selection available here. 

With progressive prizes on well-known titles like The Goonies Megaways and Fishin' Frenzy Megaways regularly reaching seven figures, these games offer a strong appeal for jackpot enthusiasts.

Premium Live Casino

Live casino fans are well-catered to as well, with 150+ live dealer tables available.

Provided by Evolution Gaming and Pragmatic Play Live, you can be assured of the most authentic live casino experience possible.

I found the mobile casino app experience at 666 Casino a little confusing. I couldn’t find the apps when I searched directly in the App Store and Play Store, but the download links on the site work. 

The apps have okay ratings, but they’re not amazing. Most of the bad reviews were about poor customer support or lack of bonuses, so there doesn’t seem to be anything wrong with the actual app. 

I gave it a try and was pleased to see that all of the games are available and the app worked smoothly on my iOS device. 

I also had a look at the browser-based mobile site and while it’s not the most modern visually, it worked fine and it was easy enough to navigate.