Onyx Slots Sister Site
Onyx Slots, a online casino hosted by the Grace Media Limited platform, operates alongside several other sister sites.
Siter Sites hosted by Grace Media Limited
Hotstreak Casino
Deposit £20 & Get 100 No Wager Free Spins
Is Licensed By: UKGC
terms and conditions
First deposit only. Min deposit £20. Min wager £20 on slots. Max 100 free spins. Max one claim. Spin credited within 7 days after deposit. Spins valid on Big Bass Splash. Spin Value 10p . Full T&Cs Apply 18+
Vegas Wins Casino
Welcome Bonus up to £500
Is Licensed By: UKGC
terms and conditions
New players only, First 3 deposits only. Min deposit £10. Max total bonus £500 and 150 spins. 30x wagering (dep + bonus). 30x on spins, 4x conversion, bonus and spins valid on selected slots. T&C’s appl
Cosmic Spins Casino
100% up to £100 Welcome Match Deposit Bonus
Is Licensed By: UKGC
terms and conditions
First deposit only. Min deposit £10. 100% Bonus Match on 1st deposit, max £100 bonus; 100 bonus spins on Starburst. 40x wagering(dep+bonus). 40x on spins, 4x conversion, bonus valid on selected slots. Full T&Cs apply. #AD, 18+ only, begambleaware.org
Breakdown of Onyx Slots
- Casino Name: Onyx Slots
- Launch Date: 2023
- Parent Company: Grace Media Limited
- Payment: Visa , Mastercard , Trustly , PayPal , Interac
- Software Providers: Netent , Playngo , Pragmatic , Microgaming , Redtiger , Irondog , Foxium
- Games: Slots , Live Casino , Slingo , Roulette
Current Promotion
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.
Pros
- Wagering Free Free Welcome Bonus
- Top For Slots
- Fully Licensed
Video Slots featured at Onyx Slots as of August 2025
Finn and the Swirly Spin
Do you have the true luck of the Irish? Then try your hand at the online slot Finn and the Swirly Spin, and see what Finn has in store—big payouts, sparkling golden bars, and magical slot features await!
Finn and the Swirly Spin Features:
- Free Spins
- Expanding Wild
- Wilds
- Instant Wins
- Multipliers
- Scatter Symbols
- Autoplay
- Theme: Modern
- Volatility: Low
- Release Date: 2018-03-01
- RTP (Return to Players): 96.62%
- Reels: 5
- Min Bet: £
- Max Bet: 0.10£ (in UK 5£)
- Provider: NetEnt
- Paylines: 200
Butterfly Staxx
One of the most visually stunning slots, featuring sparkling-coloured reels and expressive symbols set in a glowing environment. It also delivers bursts of big payouts and jackpots, even on your mobile.
Butterfly Staxx Features:
- Free Spins
- Respins
- Wilds
- Scatter Symbols
- Volatility: Low
- Theme: Classic
- Release Date: 2017-01-09
- RTP (Return to Players): 96.80%
- Reels: 5
- Min Bet: 0.2£
- Max Bet: 400£ (in UK 5£)
- Provider: NetEnt
- Paylines: 40
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:
- Autoplay
- Free Spins
- Wilds
- Gamble
- Theme: Modern
- Volatility: High
- Release Date: 2024-07-04
- RTP (Return to Players): 96.58%
- Reels: 5
- Min Bet: 0.1£
- Max Bet: 100£ (in UK 5£)
- Provider: Play'n GO
- Paylines: 10
Matsuri Slot
Feel the pulse and excitement of a traditional Japanese festival in Matsuri, a beautiful 5-reel slot from Play'n GO that honours the culture and traditions of East Asia.
Matsuri Slot Features:
- Free Spins
- Wilds
- Multipliers
- Scatter Symbols
- Autoplay
- Pay Both Ways
- Theme: Modern
- Volatility: Medium
- Release Date: 2020-06-01
- RTP (Return to Players): 96.20%
- Reels: 5
- Min Bet: 0.25£
- Max Bet: 100£ (in UK 5£)
- Provider: Play'n GO
- Paylines: 10
Riches of Midgard
Enter the fabled land of Midgard, a lush kingdom with a cartoon aesthetic. The vibe, on the whole, is pretty cheery and upbeat, maintaining premium graphics and a Norse themed soundtrack throughout.
Riches of Midgard Features:
- Respins
- Free Spins
- Scatter Symbols
- Wilds
- Volatility: Low
- Volatility: Medium
- Theme: Modern
- Release Date: 2020-12-01
- RTP (Return to Players): 96.03%%
- Reels: 3
- Min Bet: 0.20£
- Max Bet: 100£ (in UK 5£)
- Provider: NetEnt
- Paylines: 9-27
Player Reviews
Leave your thoughts and opinions below