TheOnlineCasino Sister Site

TheOnlineCasino, a siter site hosted by the Progress Play Ltd platform, operates alongside several other sister sites.
Siter Sites hosted by Progress Play Ltd
Breakdown of TheOnlineCasino
- Casino Name: TheOnlineCasino
- Launch Date: 2021
- Parent Company: Progress Play Ltd
- Payment: Mastercard , Neteller , Paypal , Skrill , Visa , Applepay
- Software Providers: Bigtimegaming , Elk , Evolution , Microgaming , Netent , Playngo , Playtech , Pragmatic
- Games: Livecasino , Slingo , Slots , Sportsbetting , Tablegames
- Slot Games: Bigbasssplash , Bookofdead , Starburst
- Table Games: Blackjack , Roulette
Current Promotion
Casinos | Bonus | Visit |
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TheOnlineCasinoBonus: 200% up to £50 Welcome Bonus Free Spins: 20 Wager Free Spins Minimum Deposit: £10 |
Visit |
New Players Only. Wagering occurs from real balance first. 50X wagering the bonus. Contribution may vary per game. Available on selected games only. The wagering requirement is calculated on bonus bets only. Bonus valid 30 Days from receipt/Free spins valid 7 days from receipt. Max conversion: 3 X the bonus amount. Limited to 5 brands within the network. Withdrawal requests void all active/pending bonuses. Excluded Skrill and Neteller deposits.Full Terms apply. 18+ T&C's | GambleAware® #AD |
Pros
- Terrific Non Wagering Bonus
- Well Known & Trusted Brand
- Top Choice of Games
Video Slots featured at TheOnlineCasino as of September 2025
Hotline Slot

Let’s head to the Miami Vice slot, full of glamour and palm trees — this online slot lines up some hot paylines for a chance at the biggest wins.
Hotline Slot Features:
- Expanding Wild
- Free Spins
- Wilds
- Scatter Symbols
- Autoplay
- Volatility: Medium
- Videoslot
- Release Date: 2018-03-22
- RTP (Return to Players): 96.13%
- Reels: 5
- Min Bet: 0.15£
- Max Bet: 150£ (in UK 5£)
- Provider: NetEnt
- Paylines: 30
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
Seregeti Kings Slot

This online slot takes you on a safari through the wilds of Africa, where you’ll come face-to-face with the kings of the savannah, from roaring lions to sleek panthers. With a backdrop set deep in the heart of the savannah, the game delivers a classic slot experience packed with the potential for big wins, especially when luck is on your side.
Seregeti Kings Slot Features:
- Free Spins
- Respins
- Wilds
- Multipliers
- Theme: Modern
- Volatility: Medium
- Volatility: High
- Release Date: 2020-01-01
- RTP (Return to Players): 96.7%
- Reels: 5
- Min Bet: 0.10£
- Max Bet: 100£ (in UK 5£)
- Provider: NetEnt
- Paylines: 26
Imperial Riches

Spin the reels and watch out for the avalanche of symbols. You can win on more than one payline combination — if the symbols keep falling, the avalanche continues and can lead to big wins.
Imperial Riches Features:
- Free Spins
- Wilds
- Scatter Symbols
- Autoplay
- Theme: Modern
- Game Type: Jackpot Games
- Game Type: Progressive Jackpots
- Game Type: Cascade Slots
- Game Type: Avalanche
- Volatility: Low
- Release Date: 2019-09-01
- RTP (Return to Players): 96.88%
- Reels: 5
- Min Bet: 0.15£
- Max Bet: 30£ (in UK 5£)
- Provider: NetEnt
- Paylines: 15
Whispering Winds Slot

Enter the hidden world of ninjas in this Asian-inspired slot, where vibrant visuals and the chance for big payouts come together for an exciting gameplay experience.
Whispering Winds Slot Features:
- Free Spins
- Expanding Symbols
- Scatter Symbols
- Autoplay
- Instant Wins
- Multipliers
- Mystery Symbols
- Theme: Modern
- Volatility: Medium
- Release Date: 2024-07-11
- RTP (Return to Players): 96.23%
- Reels: 5
- Min Bet: 0.05£
- Max Bet: 100£ (in UK 5£)
- Provider: Play'n GO
- Paylines: 25