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

Current Promotion

Onyx Slots

Bonus: Wager Free Spins Welcome Package

Promotions: no wager bonus

Bonus Spins: 50 Bonus Spins

Games Applicable: Big Bass Bonanza

Wager Requirement: None

licensed by: UKGC

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.

Pros

Video Slots featured at Onyx Slots as of August 2025

Butterfly Staxx

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:

Features
  • Free Spins
  • Respins
  • Wilds
  • Scatter Symbols
Type
  • Volatility: Low
  • Theme: Classic
Stats
  • 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

Hall of Gods

Hall of Gods

Hall of Gods is a legendary Norse mythology-themed slot from NetEnt that immerses players in a world of gods, dragons, and epic treasures. Featuring 5 reels and 20 paylines, the game includes expanding wilds, a bonus game, and free spins. Its standout feature is the progressive jackpot, offering the chance to win life-changing prizes. With stunning visuals and atmospheric sound design, Hall of Gods delivers a powerful and immersive gaming experience.

Hall of Gods Features:

Features
  • Free Spins
  • Wilds
  • Scatter Symbols
  • Autoplay
Type
  • Theme: Modern
  • Game Type: Jackpot Games
  • Game Type: Progressive Jackpots
  • Volatility: Medium
Stats
  • Release Date: 2013-10-01
  • RTP (Return to Players): 96.10%
  • Reels: 5
  • Min Bet: 0.20£
  • Max Bet: 50£ (in UK 5£)
  • Provider: NetEnt
  • Paylines: 20

Gemix

Gemix

similar 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:

Features
  • Expanding Rows
  • Free Spins
  • Mystery Symbols
  • Respins
  • Multipliers
  • Wilds
  • sticky Symbols
Type
  • Volatility: High
  • Game Type: Avalanche
  • Game Type: Cascade Slots
  • Game type: Megaway Slots
Stats
  • Release Date: 2018-06-18
  • RTP (Return to Players): 96.2%
  • Reels: 7
  • Min Bet: 0.1£
  • Max Bet: 20£ (in UK 5£)
  • Provider: Play'n GO

Riches of Midgard

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:

Features
  • Respins
  • Free Spins
  • Scatter Symbols
  • Wilds
Type
  • Volatility: Low
  • Volatility: Medium
  • Theme: Modern
Stats
  • 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

Copy Cats

Copy Cats

Are you just a copycat, or will you chase the big payout in this adorable cat-themed slot? With symbols of milk, toys, and playful charm, every spin could lead to big wins and hidden rewards.

Copy Cats Features:

Features
  • Free Spins
  • Wilds
  • Multipliers
  • Scatter Symbols
  • Autoplay
Type
  • Theme: Modern
  • Volatility: Medium
Stats
  • Release Date: 2017-03-01
  • RTP (Return to Players): 96.72%
  • Reels: 5
  • Min Bet: 0.20£
  • Max Bet: 100£ (in UK 5£)
  • Provider: NetEnt
  • Paylines: 25