Onyx Slots

About

Onyx Slots is a online casino that offers no-wager free spins, holds a UK license, and has low first deposit requirements. The game lobby at this casino host the latest slot games from some of the most well-known and trusted software providers for both slot games and table games.

If you prefer playing new slots on your mobile, you can play on most devices as the game lobby runs directly in the web browser, with no need to download any apps.

Bonuses and Promotions

The casino rewards new players from the UK with a no-wagering bonus. Create a new account and make a minimum deposit to claim the wager-free spins.

No bonus codes are needed to claim the free spins, which can be used to wager on Big Bass Bonanza by Pragmatic Play.

The casino runs regular match bonuses, boosts, bonus spins, and cash prizes, which can be found under the bonus section in My Account.

The current promotion as of April 2025 includes:

Onyx Slots

Bonus: Wager Free Spins Welcome Package

Promotions: no wager bonus

Free Spins: 50 Bonus Spins

Games Applicable: Big Bass Bonanza

Wager Requirement: None

Minimum Deposit: £10

Visit

Onyx Slots Terms and Conditions: 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 18+ T&C's | BeGambleAware® #AD.

How to Register an Account and Claim the Bonus

To login at Onyx Slots you will need to have a account, To create a new account and claim the bonus, click the "Visit" button above and follow these easy steps:

1. Click the "Register" or "Claim" button.
2. Fill out the form with your gender, name, date of birth, phone number, and email.
3. Accept the terms and conditions.
4. Once your account is verified and created, make a minimum deposit to claim the no-wagering bonus.
5. After making the minimum deposit, you can claim the bonus once it has been activated.

We recommend claiming the bonus only after your account is created and you can successfully login on the website.

Game Lobby

At Onyx Slots, players can choose from a wide range of casino games in the game lobby, including slots, table games, and live games.

The slot selection features over 600, including Megaways and progressive jackpots.

Table games include blackjack, baccarat, roulette, and poker, hosted by NetEnt and Pragmatic Play, which are well-known providers with a long track record in the gambling industry.

The live casino section is streamed in HD and features blackjack, roulette, and live game shows, all hosted by leading providers like Evolution Gaming and Pragmatic Play.

Below are some of the most popular casino games available in the game lobby as of April 2025:

Oasis of Dead Slot

This slot allows players to wager on a 5 x 3 reel with 10 paylines and offers the chance for an extra payout in the game round, which is optional and does not contribute to the RTP.

Oasis of Dead Slot Features:

• Category: Online Slot Game
• Provider: Play'n GO
• Theme: Mesoamerican Adventure
• Number of Reels: 5
• Number of Paylines: 10
• Minimum Bet: £0.01 per line
• Maximum Bet: £100
• Jackpot Type: Non-progressive
• RTP (Return to Player): 96%
• Volatility: High
• Special Features:Free Spins, Gamble Rounds

Play'n GO 'Piranha Pays' slot

'Piranha Pays' Slot, Min Bet: 0.10 , Max:50.0, Muliplayer Max: 5000x

Play'n GO 'Piranha Pays' slot Features:

• Free Spins
• Wild Symbols
• Scatter Symbols
• Paylines: 5x4 / 5x5 / 5x6 / 5x7 / 5x8

Book of Oz

Book of Oz is an exciting game that is a collaboration between Microgaming and Triple Edge Studios. Almost completely emerald green and a great nod to the film, this game offers free spins, respins and the choice to spin one reel at a time.

Book of Oz Features:

• 96.5% RTP
• Medium Variance
• Scatters
• Wilds
• Expanding Symbols
• Free Spins
• Spin One Reel at a Time
• Max Win: x5000
• Release Date: 2020

Gemix

Simialr to the popular Candy Crush Saga Game, Gemix is played on 7x7 structure with rainbow colours gems, hearts and stars adorning the reels.

Gemix Features:

• Category: Online Slot Game
• Provider: Play'n GO
• Theme: Fantasy, Gems
• Game Structure: 7x7 Grid
• Pay Mechanism: Cluster Pays
• Minimum Bet: £0.50
• Maximum Bet: £100
• RTP (Return to Player): 96.75%
• Volatility: Medium
• Special Features: Crystal Charge Effects, World Pattern, Super Charge

Boat Bonanza Down Under

The fishing fleet has set sail for the warmer waters of Australia, but they’ll have to be wary down under. With some pretty big fish about they’ll need help to land some bonza catches.

Boat Bonanza Down Under Features:

• RTP: 84 - 96%
• Volatility: Medium - High
• Paylines: 12
• Scatters
• Bonus Catch
• Free Spins

Who Supplies Its Games?

The casino partners with leading software providers, such as NetEnt, Play'n GO, Yggdrasil, Pragmatic Play, Thunderkick, Microgaming, EGT, with Microgaming hosting the best games.

This partnership ensures a high-quality gaming experience that matches the overall theme of the casino, offering visually appealing and innovative games with bonus features like free spins and re-spins.

These software providers are fully RTP-verified by third parties and hold licenses.

What Are the RTP Rates?

The casino provides competitive RTP rates for its games, with most slots and table games featuring RTP percentages above 95.98%. Big Bass Bonanza by Pragmatic Play, available in the game lobby and included in the no-wager bonus, boasts an impressive RTP of 96.71%.

Payment Methods

The casino offers various payment methods, including credit cards (Visa and Mastercard) and e-wallets (Skrill and Neteller), all with no fees and fast, nearly instant withdrawals.

At Onyx Slots, withdrawals are subject to a minimum deposit and are processed within 24 hours. Players must have a verified account before requesting a withdrawal and may be required to upload documents for verification.

Is it Legit?

Onyx Slots is a licensed casino that holds a gambling license from the UK Gambling Commission and promotes safe gambling with features such as deposit limits and self-exclusion tools.

Customer Support

To contact customer support, the following alternatives are available 24/7: email and live chat, along with a helpful FAQ section.

Live chat is not available 24/7, so be sure to check the opening hours based on your location.

Support for withdrawals or payments may have a longer response time, depending on the nature of your query.

Our Review

In our review of this no-wagering casino, the highlight is its no-wager bonus, which allows players to claim extra no-wager free spins with only a minimum first deposit.

Additionally, its focus on the latest slot games, fast payment options, and a secure environment that promotes responsible gambling make it a great choice for any player looking for a new slot site.