Onyx Slots Casino Overview and Sister Sites

Onyx Slots is an online casino operated by Grace Media (Gibraltar) Limited, headquartered at 117 Main Street, Gibraltar, GX11 1AA. The site stands out in a competitive market through a range of welcome offers and a substantial collection of games. Exploring its network reveals a family of sister sites, each offering unique themes and experiences, yet sharing much of the same core content and structure.

Exclusive Onyx Slots Bonus Offers

New and existing players at Onyx Slots can take advantage of a rich selection of promotions. The site frequently updates its bonus line-up, offering generous deals such as matched deposit bonuses and free spins. Key examples include:

  • Up to 285% bonus on deposits, potentially reaching £9,000, along with 225 free spins (35x wagering applies)

  • Deposit £7,000 to claim an additional 150 free spins (40x wagering)

  • Receive a 500% match up to £2,500, plus 50 free spins (35x wagering)

  • Enjoy a 400% match bonus up to £5,000, with 50 free spins (35x wagering)

  • 200% match up to £500 plus 20% cashback (40x wagering)

  • Welcome packages such as £1,000 bonus with 100 free spins (40x wagering)

  • 150% up to £750 along with 100 free spins (35x wagering)

  • Deposit matches of 200% up to £3,000 with 200 spins (35x wagering)

  • Special offers including 100% up to £80, 100% up to £100 with free spins, and more for first deposits

All offers are available to users aged 18 and over, with terms and conditions, qualifying deposit amounts, and wagering requirements applying. Always consult the Onyx Slots promotions page for the current details and eligibility criteria.

Grace Media Casino Network: Onyx Slots Sister Sites in 2025

Grace Media (Gibraltar) Limited has restructured its portfolio, relocating from Manchester to Gibraltar to benefit from improved business conditions. The group currently runs an expanding network of more than forty casino brands targeted at UK players. While some legacy sites have closed, new ventures continue to emerge. Below are highlights from the most prominent Onyx Slots sister sites:

Mango Spins

Mango Spins stands out among fruit-themed online casinos by opting for the vibrant mango instead of the usual cherries and lemons. Its modern, easy-to-navigate interface operates on a shared platform design common across Grace Media brands. Although the visual layout is quite uniform with its sister sites, Mango Spins offers a good range of popular slot games and diverse promotions that attract casual and experienced players alike.

Vegas Kings Casino

Vegas Kings Casino presents a Las Vegas style environment, though its execution is relatively modest compared to leading operators. The site uses the same web template as Mango Spins, lacking standout design touches. Nonetheless, its library of games and promotional offers ensures a consistent quality experience for those who value substance over style.

Hot Streak Casino

Hot Streak Casino, accessible via hotstreakcasino.com, has rapidly gained popularity since its 2023 launch. The branding sometimes causes confusion, as the logo refers to “Hot Streak Slots” while the official name is Hot Streak Casino. Regardless, the site mirrors other Grace Media brands in layout and content, offering a wide selection of slots and recurring promotions that have earned it a sizable following.

Jackpot Molly

Jackpot Molly entered the scene in the latter half of 2023, joining its counterparts with a familiar design and equivalent feature set. The origins of the site’s name may be obscure, but it remains competitive by providing a balanced mix of slot titles and bonuses, despite not having a distinctive theme to set it apart from the rest of the network.

Planet Rock Casino

Planet Rock Casino distinguishes itself as the flagship of the Grace Media network, primarily due to its partnership with Planet Rock Radio. The music-centric design introduces branded slots featuring legendary acts like Guns N’ Roses, Jimi Hendrix, and Ozzy Osbourne. For players with an affinity for both casino gaming and rock music, Planet Rock Casino stands out as a uniquely entertaining option within the group.

Is Onyx Slots a Reliable Casino?

Players seeking security and transparency will find Onyx Slots to be a trustworthy choice, thanks to several key factors:

  • Licensing: Officially licensed by the UK Gambling Commission (license number 57869) with a clean compliance record.

  • UK Accessibility: The site accepts players from the UK, unlike some in the network.

  • User Feedback: There are currently insufficient Trustpilot reviews for an aggregated rating.

  • Corporate Base: Operated by Grace Media (Gibraltar) Limited, based in Gibraltar.

  • Bonus Terms: Standard wagering requirement of x30 for deposit bonuses.

  • Customer Support: Support available through a web form and an automated chat feature, though no phone assistance is offered.

  • Withdrawal Options: Payments can be processed via debit card, PayPal, MuchBetter, and Trustly, usually within 24 hours where possible.

  • Sister Sites: Grace Media operates roughly forty related brands in the UK market.

  • Games Portfolio: Library includes approximately 750 slot titles, complemented by live casino and instant win options.

  • Responsible Gambling: The site is registered with the GamStop self-exclusion program.

Onyx Slots In-Depth Review 2025

Launched in 2024, Onyx Slots draws its inspiration from the dark, layered gemstone for which it is named. The site’s straightforward presentation sets it apart, yet much of its functionality and content parallels other sites within its operator’s network. Here’s a closer look at what Onyx Slots offers in the current gaming landscape:

Welcome Bonuses for New Players

Onyx Slots currently impresses with an array of welcome offers. New members can receive up to 100 free spins—with no wagering requirements attached. For each deposit of £10, players unlock 20 spins on Zeus vs Hades: Gods of War, claimable up to five times for a total of 100 spins. Winnings from these spins are withdrawable as cash, and players have five days to use the spins before they expire.

Grace Media brands have also expanded their welcome choices, and Onyx Slots mirrors this approach with bonuses such as:

  • 150 free spins distributed over five days

  • 150 spins combined with up to £100 cashback

  • A matched deposit bonus of £120 and 60 spins split across three deposits

  • 200 spins available over the first five deposits

Deposit bonuses generally require a 30x playthrough, and the scale of each offer depends on the initial deposit amount. As promotions are subject to frequent updates, players should always refer to the official Promotions page for the latest information.

Regular Promotions

Although first-time bonuses have improved, recurring promotions at Onyx Slots are limited. The principal recurring offer is a monthly bonus wheel, reserved for users who deposit at least £250 in the preceding month. This wheel dispenses free spins only. While previously, there were weekly wheels, the shift to a monthly format represents a reduction in ongoing reward opportunities. Additionally, the site’s “Rewards” page mainly lists new game launches and security features, rather than player perks.

Key Advantages and Limitations

  • Advantages: Transparent layout with instant visibility of bonuses and top slots. The primary welcome offer is notably free from wagering requirements on spins—a significant benefit for new arrivals.

  • Limitations: The site’s minimalist approach lacks engaging ongoing promotions and offers fewer than 1,000 games, leaving it behind top-tier competitors. Further, withdrawals, especially by debit card, may not be as prompt as some modern casinos.

Top Games Selection

Slots are the principal focus at Onyx Slots, though live dealer and instant win games are available in dedicated sections. Top titles are grouped into categories for easy navigation, with a rotating selection featured based on popularity. For instance, players frequently find Wolf Gold, Call of the Wild, and entries from the Big Bass Bonanza series among the “Hot Slots”. The “Featured” section typically spotlights established favorites like Starburst, Fishin’ Frenzy, Boat Bonanza, and Gold Cash: Big Spins.

Withdrawals and Payment Methods

Withdrawals are supported via UK debit cards, Trustly, PayPal, and MuchBetter. E-wallets and Trustly transactions are generally processed within 48 hours, offering the fastest turnaround. Debit card withdrawals may take from the next working day up to a week, depending on the processing schedule.

Support and Regulation

Customer service is available through a site form and an automated chat system. The chat is initially managed by a bot, and connecting with a human operator may require persistence. Onyx Slots is fully licensed by the UK Gambling Commission (license number 57869), ensuring adherence to industry standards and player protection protocols. This license also shields all sister sites under the Grace Media umbrella.

Final Thoughts on Onyx Slots

Onyx Slots offers a solid, if unspectacular, user experience that will appeal most to new casino players or fans of the Grace Media platform. The absence of engaging loyalty programs and more varied promotions may leave dedicated players wanting more, but the honest presentation and no-wagering welcome spins provide genuine value. While it may not stand out as the most ambitious site in the company’s portfolio, Onyx Slots remains a trustworthy and user-friendly choice within a crowded market.