20+ years reviewing 10,000+ slots, breaking down games honestly to help you make smarter choices and have fun.
- Book of 99 the UK’s highest RTP slot
- Still time to win Hacksaw Gaming merch
- New slot games from Print Studios, Hacksaw Gaming, Pragmatic Play & 4ThePlayer
This week, I’ve updated the Best Payout Slots guide to highlight the UK’s highest RTP slot game available at slot sites. With the exclusive Hacksaw Gaming merch giveaway promotion still running, there are new releases from 4 major studios.
Digest with 1 weekly news post
Highest RTP Slot in the UK: Relax Gaming’s Book of 99
- RTP: 99%
- Max Win: 12,075x
- Volatility: Very High
- Stakes: 10p to ÂŁ5
- Release Date: 4 May 2021
Whilst updating the Best Payouts Slots guide, I discovered that the game that held the top position (Playtech’s Ugga Bugga) isn’t not available to play for real money in the UK.
This means that Relax Gaming’s Book of 99 is the UK’s highest RTP slot game. With a Greek mythology theme, you battle amongst the gods on 5 reels and 10 paylines, from 10p per spin.
Focusing on the Free Spins feature, you start with 10 free spins plus a randomly chosen special expanding symbol. Additionally, you can trigger the feature by landing 3 Book Wild/Scatter symbols or by accumulating a total of 99 Book Wild/Scatter symbols.
With 12,075 x bet max wins available in the feature, Book of 99 boasts, you guessed it, a 99% RTP rate.
Where is the 99% RTP rate available?
Book of 99 is available to play for real money at Slots Temple. A UK-focused site, they have caused quite the stir since launching in 2025 due their Best Slots Odds Guaranteed policy.
Offering the highest RTP rates for all slot games, you won’t find the same slot game with higher RTP odds at any other UK casino. There are other reasons to play at Slots Temple too:
- 🎰 1,000+ slot games from the top studios
- đź’Ž Exclusive RTP rates on popular NetEnt slots such as Starburst
- 🆓 No deposit slot tournaments with real cash prizes
- ⚡ Free & fast withdrawals
- 🔄 Regular Cashback offers
Exclusive Hacksaw Gaming Merch Giveaway
Want to win Hacksaw Gaming merch? Our exclusive giveaway sees 5 x €100 merch vouchers up for grabs.
With time still left to enter (until the 15th of May 2026), all you need to do is subscriber to the Reel Talk slots newsletter and leave a comment on any Hacksaw Gaming slot game.
New Slot Games Released this Week
With new slot games from all the top studios, I look at new releases from Print Studios, Hacksaw Gaming, Pragmatic Play and 4ThePlayer:
29/04/2026: Phantom Pulse (Print Studios)
- RTP: 96.4%
- Max Win: 20,000x
- Volatility: Very High
- Stakes: 10p to ÂŁ5
- Release Date: 29 April 2026
Nolimit City’s San Quentin Manhunt is an extreme volatility slot, played on a 6x5, Scatter Pays grid. Set in a chaotic prison break, it features cascading wins, Multiplier Blocks that double with each hit, and Enhancer Cells that unlock modifiers like xWays, xSplit and special effects. 2 free spins modes carry over multipliers and unlocked Enhancer features, they offer Multiplier Block values up to 512x and corner Enhancer Cells, for up to 46,532 x bet max win potential.
30/04/2026: Dynasty of Death (Hacksaw Gaming)
- RTP: 96.27%
- Max Win: 12,500x
- Volatility: High
- Stakes: 10p to ÂŁ5
- Release Date: 30 April 2026
Pragmatic Play’s Great Ghosts is a high-volatility slot with 5 reels and 50 paylines. With a 96.5% RTP rate, it has a cartoon-style haunted mansion theme, blending light visuals with high-risk gameplay. The core mechanic is the Ghost Respin feature, where money symbols lock in place and modifiers like upgrades, mystery effects and extra respins combine for bigger wins. It comes with 40,000 x bet max wins.
30/04/2026: Sweet Bonanza 2500 (Pragmatic Play)
- RTP: 96.52%
- Max Win: 25,000x
- Volatility: Very High
- Stakes: 20p to ÂŁ5
- Release Date: 30 April 2026
ELK Studios’ Huff N’ Puff CollectR is part of the Huff N’ Puff series and is played on a 6x6 grid with the unique CollectR mechanic. With a Three Little Pigs theme, pig symbols move around collecting gems, multipliers and feature symbols. A collection meter unlocks bonuses like free spins, upgrades, special effects and an 8x8 grid, while the Big Bad Wolf triggers random events. Packed with features, this multi-layer slot comes with 5,000 x bet max win potential.
30/04/2026: 4TP Book of AfricRa (4ThePlayer)
- RTP: 94%
- Max Win: 7,500x
- Volatility: High
- Stakes: 10p to ÂŁ5
- Release Date: 30 April 2026
Shady Lady’s Preach TV is set in a satirical televangelist TV studio and has 5 reels and 1,024 ways to win. It focuses on 3 random TV features that transform symbols, award instant coin wins and trigger the Preacher’s Shady Nudge mechanic, which can cascade up to 200 times. Free spins and super free spins increase feature frequency and payout potential, up to 20,000 x your total bet.
Keep on top of the latest releases in the Demo Slots section
Want to get the latest new via email?
Subscribe to the Reel Talk: it’s a free weekly slots newsletter packed with exclusive competitions, new slot previews and demos, free spins alerts, deep-dive Q&As, and merch giveaways.
