Onyx Slots Sister Site

Onyx Slots, a siter site hosted by the Grace Media Limited platform, operates alongside several other sister sites.

Breakdown of Onyx Slots

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Casinos Bonus Visit

Onyx Slots

Bonus: Wager Free Spins Welcome Package

Free Spins: 50 Bonus Spins

Minimum Deposit: £10

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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

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

Pros

Video Slots featured at Onyx Slots as of July 2025

The Book of Dead By Play 'N Go

The Book of Dead By Play 'N Go

Hugely popular slot game from Play 'N Go, follow Rich on his treasure seeking adventures in ancient Egypt.

The Book of Dead By Play 'N Go Features:

Features
  • Free Spins
  • Autoplay
  • Scatter Symbols
  • Gamble
Type
  • Theme: Classic
  • Game Type: Cascade Slots
  • Volatility: High
Stats
  • Release Date: 2016-01-01
  • RTP (Return to Players): 96.21%
  • Reels: 5
  • Min Bet: 0.2£
  • Max Bet: 100£ (in UK 5£)
  • Provider: Play'n GO
  • Paylines: 10

Fire Joker

Fire Joker

This slot turns up the heat with Re-Spins and a real chance to win big. Ready to spin? Let’s turn up the heat and see if luck’s on your side!

Fire Joker Features:

Features
  • Respins
  • Wilds
  • sticky Symbols
  • Multipliers
  • Autoplay
Type
  • Theme: Classic
  • Volatility: Medium
Stats
  • Release Date: 2016-06-13
  • RTP (Return to Players): 96.15%
  • Reels: 3
  • Min Bet: 0.05£
  • Max Bet: 100£ (in UK 5£)
  • Provider: Play'n GO
  • Paylines: 5

Gonzos Quest

Gonzos Quest

The legend that is Gonzo's Quest™ meets MegaWays™ for wins of over 20,000x in the thrilling search for El Dorado! Tag along with Gonzo, the quirky bearded Spanish explorer, as he ventures through the deepest jungle in search of the long lost city of gold

Gonzos Quest Features:

Features
  • Respins
  • Free Spins
  • Wilds
  • Multipliers
  • Autoplay
Type
  • Theme: Classic
  • Game Type: Avalanche
Stats
  • Release Date: 2011-02-08
  • RTP (Return to Players): 96%%
  • Reels: 5
  • Min Bet: 0.2£
  • Max Bet: 50£ (in UK 5£)
  • Provider: NetEnt
  • Paylines: 20

Golden Grimoire

Golden Grimoire

Turn the reels and uncover the right spell to trigger jackpots and hidden free spins in this magical online slot adventure.

Golden Grimoire Features:

Features
  • Free Spins
  • Expanding Wild
  • sticky Symbols
  • Wilds
  • Mystery Symbols
  • Scatter Symbols
  • Autoplay
Type
  • Theme: Modern
  • Volatility: Low
Stats
  • Release Date: 2019-02-22
  • RTP (Return to Players): 96.44%
  • Reels: 5
  • Min Bet: 0.20£
  • Max Bet: 400£ (in UK 5£)
  • Provider: NetEnt
  • Paylines: 40

Vegas Nightlife

Vegas Nightlife

Step into a Vegas night lit by neon and bright lights – an evening of excitement, glamour, and the chance to win big jackpots.

Vegas Nightlife Features:

Features
  • Free Spins
  • Wilds
  • Scatter Symbols
  • Instant Wins
Type
  • Theme: Classic
  • Game Type: Jackpot Games
  • Game Type: Progressive Jackpots
  • Volatility: Medium
Stats
  • Release Date: 2020-10-01
  • RTP (Return to Players): 96%%
  • Reels: 5
  • Min Bet: 0.20£
  • Max Bet: 100£ (in UK 5£)
  • Provider: NetEnt
  • Paylines: 20