Onyx Slots

Paul Aitken
Last update: 20/05/2025

Bingo Paradise Rating

Onyx Slots is a fairly new online casino at the time of writing this review, but it comes from a respected operator with several big sites on its books. It features a simple design with hundreds of slots and table games from numerous popular iGaming developers. There are a couple of bonuses waiting for you when you first join the casino, and when it comes time to deposit, you can take your pick from several different options, including debit cards and web wallets.

Read on to learn more about this casino.

Welcome Bonus

Onyx Slots has two welcome bonuses. The first is a no deposit free spin offer giving you 10 free spins at a value of 10p each when you sign up for an account and verify your details via SMS. Once validated, you need to launch and play the Zeus vs Hades Gods of War slot.

All of the winnings from this slot machine are released as bonus credits and are subject to a wagering requirement of 60x. There is also a win cap of 4x, with a total bonus cap of £100.

So, if you win £20 using your free spins, you must then wager £1,200 before the funds are converted to bonus credits, and you will then be restricted to winnings of no more than £80, assuming you have anything left when you get through the wagering period.

Once you’ve finished with the free welcome offer, you can make your first deposits on the site and collect up to 100 free spins. These spins are spread over your first 5 deposits, and you’ll get 20 spins each time for deposits of £10 or more.

As with the no deposit bonus, the maximum conversion amount is £100, and this applies to each stage of the bonus.

I like the fact that Onyx Slots has two welcome bonuses, and I love that you can collect both of them and don’t need to choose. But they could have been bigger—a matched deposit offer wouldn’t go amiss here.

Loyalty Promotions

Onyx Slots has a Daily Prize Wheel. To spin the wheel, you must deposit at least £10. It contains a host of prizes, including bonus spins and cash spins—the former come with wagering requirements, while the latter are wager-free. There is also a Weekly Wheel with even bigger prizes, and you can spin this for every week that you deposit a total of £100 or more.

There is also a rewards program. All players are added to this program as soon as they join the site, and they can use it to turn regular deposits and wagers into rewards points, which can then be swapped for prizes and bonuses. Check the “Rewards” section after you sign up to monitor your progress. You should also keep an eye on the “Promotions” section, making sure you use your Daily and Weekly Prize Wheel spins to get the maximum return for your deposits.

Table Games and Slots

Although there are hundreds of slots and table games on Onyx Slots, they aren’t very well organised and it’s hard to sort them by feature, theme, or mechanic. You can filter all the Megaways titles, but the name “Megaways” is also in the game title, and there is a search box, so you could have done this yourself anyway.

To be fair to Onyx Slots, this issue is not exclusive to them and I have complained about the same thing on countless other sites.

On the plus side, the games come from several top developers, with a few smaller studios thrown in. These include Alchemy Gaming, Pragmatic Play, Irondog, Blueprint Gaming, NetEnt, Play’n GO, Realistic Gaming, and Red Tiger Gaming. This means that in addition to the aforementioned Megaways slots, there are also features like Power Combo, and numerous progressive jackpots.

All are mobile-friendly, and amongst the new titles with flashy features, there are also some classic video slots. It’s a good selection, but it’s not the biggest, and it’s not very well laid out.

Deposits, Withdrawals, and Customer Support

Onyx Slots commits the ultimate sin for an online gambling site, as it charges for withdrawals. Admittedly, it only charges £1.50, and you will only be hit with this fee when withdrawing £30 or less (the minimum is £10), but it’s still a fee I’d prefer not to see.

It accepts payments using debit cards (Visa, Mastercard) and PayPal, as well as bank transfers, Pay by Mobile, MuchBetter, and Trustly. It does not accept any prepaid cards or voucher-based systems like Paysafecard, but the options it does accept should be enough to appease more players.

Should you have an issue with your deposits or withdrawals, you can contact the Onyx Slots support team using the live chat feature on the site. It connects you with customer support representatives at all hours of the day, and they usually only take a couple of minutes to respond. I found them to be nothing but helpful, even though I was essentially just messaging them with made-up issues to test their speed and professionalism.

Verdict: Onyx Slots Review

For a fairly recent addition to the UK online casino sector, Onyx Slots is a very impressive casino. It is not the biggest or the most attractive, but it’s a solid site from a respectable brand, and while the welcome bonus could be bigger, it’s good to see they have two options available.

The withdrawal fee is a bit of letdown, but it’s only £1.50, and it’s non-existent if you wait until you have at least £30 in your account.