Onyx Slots Sister Site

Onyx Slots, a sister site 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+

PlayUK Casino

Welcome Bonus up to £100

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's & C's Apply.

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 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

Current Promotion

Pros

Video Slots featured at Onyx Slots as of September 2025

Buildin' Bucks

Buildin' Bucks

Buildin' Bucks is a video slot full of prizes, set in an Irish leprechaun environment with fairies and gnomes. This lovely slot from Play’n GO features both free spins and re-spins, and includes a wheel with instant prizes. With over 243 way to win.

Buildin' Bucks Features:

Features
  • Free Spins
  • Multipliers
  • Instant Wins
  • Wilds
  • Scatter Symbols
  • Autoplay
  • Bonus Wheels
Type
  • Theme: Modern
  • Volatility: Medium
  • Has Bonus Feature
Stats
  • Release Date: 2024-09-12
  • RTP (Return to Players): 96.2%
  • Reels: 5
  • Min Bet: 0.2£
  • Max Bet: 100£ (in UK 5£)
  • Provider: Play'n GO
  • Paylines: 243

Starburst Slot

Starburst Slot

Starburst is known as the slot that launched NetEnt to the top as an online slot developer. Being released back in 2012, it’s still one of the top online slots among slot players due to its low volatility and unique paylines, with winning combinations both from left and right. Starburst is a true classic, offering low volatility that players should give a try.

Starburst Slot Features:

Features
  • Free Spins
  • Respins
  • Expanding Wild
  • Wilds
  • Scatter Symbols
  • Pay Both Ways
Type
  • Theme: Classic
  • Volatility: Low
  • Game Type: Avalanche
Stats
  • Release Date: 2012-01-01
  • RTP (Return to Players): 96.09%
  • Reels: 5
  • Min Bet: 0.1£
  • Max Bet: 100£ (in UK 5£)
  • Provider: NetEnt
  • Paylines: 10

Wild Mining XXXtreme

Wild Mining XXXtreme

Mining for gold? The creatures of Wild Mines are here to help you blast through the caves with dynamite and uncover massive wins.

Wild Mining XXXtreme Features:

Features
  • Buy Bonus Game
  • Wilds
  • Free Spins
  • Autoplay
Type
  • Volatility: High
  • Theme: Modern
  • Game Type: Cascade Slots
  • Game Type: Avalanche
Stats
  • Release Date: 2025-02-27
  • RTP (Return to Players): 96.08%
  • Reels: 6
  • Min Bet: 0.2£
  • Max Bet: 20£ (in UK 5£)
  • Provider: NetEnt
  • Paylines: fixed

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: 2025-05-29
  • RTP (Return to Players): 96.15%
  • Reels: 3
  • Min Bet: 0.05£
  • Max Bet: 100£ (in UK 5£)
  • Provider: Play'n GO
  • Paylines: 5

Dead or Alive

Dead or Alive

Dead or Alive is an iconic high variance slot from Netent with a Wild West theme, featuring well known outlaws Billy The Kid and Jesse James

Dead or Alive Features:

Features
  • Free Spins
  • Respins
  • Wilds
Type
Stats
  • Release Date: 2015-06-09
  • RTP (Return to Players): 95%%
  • Reels: 3
  • Min Bet: 0.1£
  • Max Bet: 100£ (in UK 5£)
  • Provider: NetEnt
  • Paylines: 25

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