Welcome bonus:

Up to 100 no wager free spins

New Customers Only. £10 Min. Deposit and Wager. 20 Free Spins will be allocated for each of your first 5 deposits of £10 or more. Bonus valid 48 hours from receipt. Max conversion: £100. Withdrawal requests void all active/pending bonuses. Full terms apply.



    • Jackpots to play for
    • No wagering casino
    • PayPal deposits

Casino information:

  • Casino name: ONYX Slots
  • Year established: 2024
  • Licence: Gibraltar Gambling Commission, UK Gambling Commission

Deposit methods:

    • Mastercard
    • MuchBetter
    • PayPal
    • Trustly
    • Visa

Withdrawal methods:

    • Mastercard
    • MuchBetter
    • PayPal
    • Trustly
    • Visa

Game providers:

    • 1X2gaming
    • Big Time Gaming
    • Blueprint
    • IronDog
    • NetEnt
    • Play’n GO

ONYX Slots casino overview

Oynx Slots promises players an electrifying experience from the moment they arrive at the casino. As the name suggests, this casino site is all about slots with more than 700 blockbuster titles to choose from. 

But Onyx Slots offers more than that, with a lobby packed with table games, instant wins, arcade titles, live dealer and more with games from all the major providers. 

New players casino take advantage of a no wagerging welcome bonus, with up to 100 free spins available when you make a low minimum deposit of £10. This means you get to keep your winnings. 

Onyx Slots rewards players for their loyalty and there are plenty of slot tournaments to get stuck into with decent prizes up for grabs. 

You can deposit and withdraw using popular payment method such as Visa and Mastercard as well as digital wallets like Trustly, PayPal and MuchBetter – deposits are instant and withdrawals take around two days to land in your account. 

Onyx Slots also has a dedicated customer support team to provide assistance should you need it and the casino offers all the safe gaming tools you need to stay in control of your play at all times.

ONYX Slots Casino Lobby

ONYX Slots slots and games

Onyx Slots has a solid portfolio of more than 700 games available on both desktop and mobile. This includes classic slots, video slots, jackpot slots and Megaways slots. There’s also table games, instant wins and live dealer titles. 

Just some of the game provider’s stocked include NetEnt, Red Tiger, Big Time Gaming, Pragmatic Play and Blueprint Gaming. 

The lobby might not be as vast as some of the bigger online casino sites but you’ll find all of the blockbuster titles and the latest game relases, with games to meet all player preferences.

Total number of mobile games: 700
Total number of desktop games: 700

ONYX Slots mobile casino

Onyx Slots is a mobile casino and can be accessed from all smartphones and tablets via web browser.

The mobile experience is a good one – you can claim the welcome offer, make fast deposits and withdrawals and access all games in the lobby when playing from your smartphone or tablet. 

Native app: No
Web browser: Yes

ONYX Slots casino bonuses

Oynx Slots offers the Holy Grail of welcome bonuses – free spins with no wagering requirements. To unlock the offer, simply make a £10 deposit and you’ll receive up to 100 free spins on Zeus Vs Hades: Gods of War. 

The welcome bonus runs over your first five deposits and with each £10 deposit you receive 20 no wagering free spins. It’s worth noting the max win from all free spins is £100 but there’s no wagering requirement so no matter what you win, it’s yours to keep. 

There’s also plenty of ongoing promotions including the Lucky Wheel where you can spin to win up to 30 bonus spins or 10 cash spins each day. There’s also a Weekly Prize Wheel and a selection of slot tournaments to take part in. 

ONYX Slots banking

The Onyx Slots cashier includes major debit cards like Visa and Mastercard as well as popular digital wallets such as PayPal, Trustly and MuchBetter. Deposits are instant and withdrawals take around 48 hours to process although if you use a digital wallet it can be quicker. This is a low minimum deposit casino – you can play with as little as £5 but you’ll need to make a £10 deposit to claim the welcome bonus. 

Fees: It’s worth noting there’s a £1.50 fee on withdrawals under £30. 

Payment methodMin depositDeposit timeMin withdrawalWithdrawal time
Mastercard£5Instant£53-7 day
Visa£5Instant£53-7 day
Much Better£5Instant£51 day
PayPal£5Instant£51 day
Trustly£5Instant£51 day

Onyx Slots Casino sign-up process

Signing up to Onyx Slots is quick and easy. Just follow these steps. 

  1. Tap “Play” to go to the registration page. 
  2. Enter your personal details including email and create a username and password.
  3. Enter your address.
  4. Enter your mobile number.
  5. Claim the welcome bonus, make a deposit and you’re ready to play!

Onyx Slots customer support

Email: cosmicspins@gracemediasupport.com

Live chat: Yes

Phone: 07458159505

Hours: 08:00am – 04:00am GMT

Onyx Slots responsible gambling

Onyx Slots holds an active licence from the Gambling Commission which means it’s meeting the high standards set for responsible gambling and safe gaming. As such, the casino offers a suite of tools to help you stay in control of your play including deposit limits, loss limits and session limits. You can also take time out and self-exclude for a set period if needed. Onyx also has a dedicated safe gaming page with links to support charities should you want to reach out. 

An important word on responsible gambling

Online casino is fun and enjoyed by millions of people across the UK. But it’s important that it does stay fun and that you remain in control of your play. Because we only partner with UK-licenced online casinos, each of the brands listed on Comparasino offers the tools you need to do this.


But some of these tools might be unfamiliar and it can also be tough to determine if you, or a family member or friend, could potentially have a gambling problem. That’s why we’ve created a Safe Gaming Hub where you can find information about all the responsible gambling tools offered at online casinos, how they work and which ones might be best for you.


It also contains insights into some of the early signs of problem play to be aware of in yourself and others as well as direct access to charities and organisations that support those with problem gambling habits.

Head to the Safe Gaming Hub
Responsible Gambling Copyright Comparasino