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If you love the thrill of chasing big wins, our guide to the best slot sites for high volatility slots is exactly what you need. These are games that might not pay out often, but when they do, the wins can be massive. Ideal for risk-takers and seasoned players, high variance slots offer drama, tension, and that all-important adrenaline rush. Available at the majority of UK slot sites, you can play these games in OLBG’s Demo Slots section to get a feel before playing with real money.
Top 10 High Volatility Slot Games
With most of the best slot games being high volatility, below are my top 10 picks. Each brings something different: including unique bonus features, theme, game mechanic and more.
| # | Slot Game | Provider | RTP | Volatility | Max Win (x Bet) | Minimum Bet | Release Date |
|---|---|---|---|---|---|---|---|
| 1 | Immortal Romance | Microgaming | 96.86% | Very High | 12150 | £0.30 | 01/12/2011 |
| 2 | Tombstone Slaughter | Nolimit City | 96.01% | Insane | 500000 | £0.20 | 28/01/2025 |
| 3 | Money Train 4 | Relax Gaming | 96.10% | Very High | 150000 | £0.10 | 20/09/2023 |
| 4 | Dead or Alive 2 | NetEnt | 96.80% | Very High | 111111.11 | £0.09 | 23/04/2019 |
| 5 | Razor Returns | Push Gaming | 96.55% | High | 100000 | £0.10 | 04/07/2023 |
| 6 | Jammin' Jars | Push Gaming | 96.83% | High | 19998.5 | £0.20 | 18/09/2018 |
| 7 | Mental 2 | Nolimit City | 96.06% | Insane | 99999 | £0.20 | 25/03/2025 |
| 8 | Book of Dead | Play 'n GO | 96.21% | High | 5000 | £0.10 | 14/01/2016 |
| 9 | San Quentin 2: Death Row | Nolimit City | 96.13% | Extreme | 200000 | £0.20 | 24/09/2024 |
| 10 | Starburst XXXtreme | NetEnt | 96.26% | Very High | 200000 | £0.10 | 15/07/2021 |
1. Immortal Romance (Microgaming)
- RTP: 96.86%
- Max Win: 12,150x
- Volatility: Very High
- Stakes: 30p to £5
- Release Date: 1 December 2011
Immerse yourself in Immortal Romance, a gothic-themed slot by Stormcraft Studios/Microgaming. This 5 reel, 243 ways to win game offers a 96.86% RTP and high volatility. Its standout features include the Wild Desire feature, turning up to 5 reels wild.
Then you have the Chamber of Spins: this unlocks 4 unique free spin modes tied to characters Amber, Troy, Michael, and Sarah, each with their own modifier. With 12,150 x bet max wins, this slot combines captivating storytelling with substantial payout potential. Remaining a cult icon, it’s one of my favourite games ever. If you like the theme, check out my guide to the best horror slots.
- No. of slots 2115
- Payout speed 24 Hours
- Win rate 92.4%
- Biggest Slot Providers
- No-Fee Deposits and Withdrawals
2. Tombstone Slaughter (Nolimit City)
- RTP: 96.01%
- Max Win: 500,000x
- Volatility: Insane
- Stakes: 20p to £5
- Release Date: 28 January 2025
Tombstone Slaughter is Nolimit City’s most volatile slot yet, boasting 500,000 x bet max win potential (the highest of any online slot game!). Set in a scorched Wild West town, the game follows El Gordo’s daughter’s fiery quest for vengeance.
With 6 reels and 324 ways to win (initially), it features xNudge Wilds, Reel Split Wilds, and 2 intense free spins modes. The xRIP mechanic adds to the challenge, discarding wins below your bet. This slot is a high-stakes thrill ride for daring players. Looking for more big wins? Check out my best payout slots guide which highlights games with high max win potential and RTP rates.
- No. of slots 1000+
- Payout speed Instant Options
- Win rate 96.5%
- Mobile-first Casino With Instant Withdrawals
- 6 minute withdrawals
3. Money Train 4 (Relax Gaming)
- RTP: 96.1%
- Max Win: 150,000x
- Volatility: Very High
- Stakes: 10p to £5
- Release Date: 20 September 2023
Money Train 4 is the final instalment in the popular Money Train series by Relax Gaming. Offering a futuristic, dystopian twist on the Wild West theme, it is played on a 6x6 grid with Scatter Pays.
Boasting a 96.1% RTP rate and very high volatility, the game features cinematic graphics, an orchestral soundtrack, and 150,000 x bet max win potential. Key highlights include the Money Cart Bonus feature, which introduces new bandits and special symbols for explosive combinations. Playable from 10p per spin, it's a thrilling ride for high-stakes players. Want more games using the same mechanic? Visit my Scatter Pays slots article.
- No. of slots 1500
- Payout speed 24 hours
- Win rate Variable
- UK-only Casino With 24/7 Customer Support
- Quick & Free Withdrawals
4. Dead or Alive 2 (NetEnt)
- RTP: 96.8%
- Max Win: 111,111.11x
- Volatility: Very High
- Stakes: 9p to £5
- Release Date: 23 April 2019
An upgraded sequel with enhanced graphics and three separate free spins modes. It’s all about the Sticky Wilds, which can lead to legendary payouts, especially during the High Noon Saloon feature.
By NetEnt, Dead or Alive 2 is an upgraded sequel with enhanced graphics. This high-volatility Wild West slot is played on 5 reels and 9 paylines from 9p per spin. With a 96.8% RTP rate, it offers 3 free spins features: Old Saloon, High Noon Saloon, and Train Heist.
Each with unique mechanics like sticky wilds and multipliers, you can win up to 111,111.11 x your total bet, with the High Noon Saloon mode offering the highest potential. An iconic game, read my article dedicated to the best slot game sequels.
- No. of slots 1000+
- Payout speed Instant Options
- Win rate 96.5%
- Mobile-first Casino With Instant Withdrawals
- 6 minute withdrawals
5. Razor Returns (Push Gaming)
- RTP: 96.55%
- Max Win: 100,000x
- Volatility: High
- Stakes: 10p to £5
- Release Date: 4 July 2023
Dive into the depths with Razor Returns, Push Gaming’s thrilling sequel to Razor Shark. This high-volatility slot features 5 reels and 40 paylines, offering you the chance to win up to 100,000 x your total bet.
With a 96.55% RTP, it boasts dynamic features like transforming Mystery symbols, Nudge & Reveals, and Golden Sharks that can award instant prizes up to 5,000 x bet. The Free Spins feature starts with a multiplier up to 25x, increasing with each nudge, and introduces the new Nudge Up symbol for additional free spins. It also features highly on my top animal-themed slots list.
- No. of slots 2500+
- Payout speed Instant - 24 Hours
- Win rate 96%
- Excellent Payment Options
- iOS & Android Apps
6. Jammin' Jars (Push Gaming)
- RTP: 96.83%
- Max Win: 19,998.5x
- Volatility: High
- Stakes: 20p to £5
- Release Date: 18 September 2018
Get into the groove with Jammin’ Jars, Push Gaming’s vibrant Cluster Pays slot. Set on an 8x8 grid, it features cascading wins, sticky Jam Jar Wilds with increasing multipliers, and a Rainbow feature that introduces giant fruit symbols.
The Free Games mode offers unlimited multiplier growth, enhancing win potential. With a high 96.83% RTP and max wins up to 19,998.5 x your bet, it is one of the most fun and deceptively punishing high volatility games online. Like the mechanic? Discover the top Cluster Pays slots (which include Jammin’ Jars and its sequel, Jammin’ Jars 2).
- No. of slots 1000+
- Payout speed Instant - 24 Hours
- Win rate 95.6%
- Best Slot RTP Rates
- Fast Withdrawals
7. Mental 2 (Nolimit City)
- RTP: 96.06%
- Max Win: 99,999x
- Volatility: Insane
- Stakes: 20p to £5
- Release Date: 25 March 2025
The 2025 follow-up to the notorious original. Mental 2 ramps up the intensity with even darker themes and mechanics like xSplit, xWays, and a maximum win potential that borders on terrifying.
Step into the twisted world of Mental 2, Nolimit City’s harrowing sequel to its 2021 cult hit. This extremely high volatility slot features a unique 3-2-3-2-3 reel layout with 108+ ways to win and a staggering 99,999 x bet max payout.
Key features include Fire Frames, xMental, and Dead Patient multipliers up to 9999x. With a 96.06% RTP and 3 escalating free spins modes, it’s a chilling, adrenaline-fueled experience for daring players.
- No. of slots 1110
- Payout speed 24 hours
- Win rate 97%
- Free, Instant Withdrawals
- PayPal Available For UK Users
8. Book of Dead (Play 'n GO)
- RTP: 96.21%
- Max Win: 5,000x
- Volatility: High
- Stakes: 10p to £5
- Release Date: 14 January 2016
A staple in any slot collection. Book of Dead balances classic gameplay with high volatility appeal. The expanding symbol feature during free spins is what makes it so iconic.
Embark on an ancient Egyptian adventure with Book of Dead, Play’n GO’s iconic slot featuring explorer Rich Wilde. This high volatility game is played with 5 reels and 10 paylines with an above-average 96.21% RTP rate, from 10p per spin.
Triggering the Free Spins feature grants 10 free spins with a randomly selected expanding symbol, enhancing win potential up to 5,000 x your bet. Optimised for both desktop and mobile platforms, this timeless classic has inspired countless ‘Book of’ slots and spawned an entire Wilde slots series: it is also responsible for countless free spins offers.
- No. of slots 7400+
- Payout speed 24 Hours
- Win rate Variable
- Excellent Slots & Live Dealer Options
- Exciting New UK Casino
9. San Quentin 2: Death Row (Nolimit City)
- RTP: 96.13%
- Max Win: 200,000x
- Volatility: Extreme
- Stakes: 20p to £5
- Release Date: 24 September 2024
Experience the gritty intensity of San Quentin 2: Death Row, Nolimit City's insanely high-volatility sequel that amplifies the original's features. Set on a 5x4 grid with 1,024 ways to win, this slot offers a 96.13% RTP and a staggering 200,000 x bet max win potential.
Features like Enhancer Cells, Jumping Wilds, and Green Mile Spins elevate the gameplay, providing dynamic and unpredictable action. With its dark prison theme and immersive mechanics, it's designed for players seeking high-stakes thrills. Its predecessor, San Quentin, was the game that inspired extreme and insane volatility slots.
- No. of slots 1508
- Payout speed Instant - 24 Hours
- Win rate 97.7%
- 10% Cashback always
- Exclusive All British games
10. Starburst XXXtreme (NetEnt)
- RTP: 96.26%
- Max Win: 200,000x
- Volatility: Very High
- Stakes: 10p to £5
- Release Date: 15 July 2021
NetEnt’s Starburst XXXtreme offers a volatile twist on one of the most recognisable slots ever (the low-volatility Starburst). Elevating the iconic original with intensified gameplay and colossal win potential, it’s played with 5 reels and 9 paylines, with a 96.26% RTP rate.
Central to its appeal are the Starburst Wilds, which expand on the middle reels, triggering re-spins and multipliers up to 150x: potentially combining for a staggering 450x. With a maximum win of 200,000 x your bet, this cosmic adventure is tailored for players seeking high-risk, high-reward thrills. If you like the theme, check out the best space-themed slots.
- No. of slots 2400+
- Payout speed 24 Hours
- Win rate Variable
- Excellent Jackpot Slots
- Top Live Casino Offering
High volatility (or high variance) slots are games where payouts are less frequent but tend to be significantly larger when they hit. For a full explanation, head to my guide on slot volatility or read my A to Z of slots glossary terms. These games usually have:
- Long dry spells between wins
- Bigger jackpot or bonus feature potential
- Often higher max win caps
They appeal to patient players, have a decent bankroll and are chasing larger payouts instead of regular small wins. If you enjoy suspense and the potential for dramatic outcomes, high volatility slots are for you.
Nolimit City has pushed the boundaries of high variance even further with what they call ‘extreme’ and ‘insane’ volatility slots. These labels aren't just marketing: they reflect a genuine design philosophy of ultra-high risk and astronomical win potential. Games like Mental 2, San Quentin 2, and Tombstone RIP showcase this ethos. You can expect:
- Long stretches without wins
- Brutal base games
- Explosive bonus features
- Max win potential up to 500,000 x bet
These slots are deliberately polarising: they're built for seasoned players who embrace the rollercoaster. If you enjoy dramatic gameplay, dark themes, and volatile mechanics like xWays, xSplit, and xBombs, Nolimit City's most intense offerings will deliver. Always play these with caution, and consider using demo mode first to understand how the mechanics work.
113 Best Nolimit City Slots Ranked - (Where to Play)
If you want the thrill of high volatility paired with the dream of winning a 7 or 8-figure payout, progressive jackpot slots are your best bet. While many jackpot slots are lower volatility, these 5 standout titles deliver both risk and massive reward:
5k Gold Mine Dream Drop (4ThePlayer)
Real-Time Jackpot: £1,702,031.35
- RTP: 94%
- Max Win: 5,000x
- Volatility: High
- Stakes: 20p to £5
- Release Date: 14 April 2023
Embark on a Wild West adventure with 5k Gold Mine Dream Drop, a high-volatility slot from 4ThePlayer. Featuring 5 reels, 1,024 ways to win, and a 94% RTP, this game offers 5,000 x bet max wins.
The standout Gold Rush Trail surrounds the grid, awarding cash prizes, free spins, or entry to the Dream Drop Jackpot game, where 5 progressive jackpots await. The Mega Jackpot is worth up to €2 million. If this tickles your fancy, there are plenty of Dream Drop jackpot slots to enjoy.
Gold Blitz King Millions (Microgaming)
Real-Time Jackpot: £5,046,337.44
- RTP: 90.5%
- Max Win: 5,000x
- Volatility: High
- Stakes: 20p to £5
- Release Date: 5 February 2025
Gold Blitz King Millions by Microgaming (now Games Global) is a high-volatility slot featuring 6 reels and 4,096 ways to win. With a 90.5% RTP, it offers a max win of 5,000 x your bet. The game includes a Collect feature, Free Spins with up to 5x multiplier wilds, and Gold Blitz Spins where only Collect, Cash, and Jackpot symbols appear.
Trigger the King Millions Bonus Wheel for a chance at 2 progressive jackpots: the Major starting at €1 million and the Grand at €2 million. The largest Grand Jackpot won to date is €10,943,078!
Who Wants to be a Millionaire Megapays (Big Time Gaming)
Real-Time Jackpot: £478,914.89
- RTP: 96.38%
- Max Win: 72,310x
- Volatility: High
- Stakes: 40p to £5
- Release Date: 25 August 2021
Step into the iconic game show with Who Wants to Be a Millionaire Megapays, a high-volatility slot by Big Time Gaming. Featuring 6 reels and up to 117,649 ways to win via the Megaways mechanic, it offers a 96.38% RTP and 72,310 x bet max wins.
Key features include cascading wins, the Hot Seat Free Spins Gamble with lifelines, and 4 progressive jackpots through the Megapays feature. Playable from 40p per spin, you can discover more Megaways slots in my dedicated guide.
Ancient Fortunes: Poseidon WowPot Megaways (Microgaming)
Real-Time Jackpot: £7,381,229.83
- RTP: 92.23%
- Max Win: 18,720x
- Volatility: High
- Stakes: 10p to £5
- Release Date: 19 August 2021
Dive into the depths with Ancient Fortunes: Poseidon WowPot Megaways, a high-volatility slot by Triple Edge Studios and Microgaming. Featuring 6 reels and up to 117,649 ways to win, it offers a 92.23% RTP and 18,720 x bet max wins.
Key features include Rolling Reels, Free Spins with unlimited multipliers, and the WowPot Jackpot Pick Game, where you can win 1 of 4 progressive jackpots, reaching over £2 million. It is also part of the WowPot jackpot slots network.
AP McCoy: Sporting Legends (Playtech)
Real-Time Jackpot: £144,168.03
- RTP: 95.03%
- Max Win: 38,396x
- Volatility: High
- Stakes: 25p to £5
- Release Date: 25 January 2019
Experience the thrill of horse racing with AP McCoy: Sporting Legends, a high-volatility slot by Playtech. Featuring 5 reels and 243 ways to win, it offers a 95.03% RTP and impressive 38,396 x bet max wins.
Key features include the Bonus Wheel, awarding up to 1,000 x bet cash prizes, extra free spins, and multipliers up to 49x. The game also boasts 3 progressive jackpots (Daily, Weekly, and Mega) triggered randomly on any spin. For more jackpot games based on sports icons, head to my guide to Sporting Legends slots.
Pragmatic Play has also joined the high volatility scene with its 1000 slots series. Supercharged games like Big Bass Bonanza 1000, Gates of Olympus 1000 and Sugar Rush 1000 build on their original counterparts but add amped-up features and eye-watering win potential. You can expect:
- 10,000 to 25,000 x bet max win potential
- Highly RTP rates
- Updated graphics and mechanics
These slots are perfect for fans of Pragmatic Play who want more risk and more reward.
Pragmatic Play’s 1000 Slots Series: The Ultimate Guide to Supercharged Spins
Looking to try high volatility games without dipping straight into your bankroll? Many top casinos offer free spins specifically for popular high-variance slots: great for stretching your playtime or testing a new release.
If you take Pragmatic Play’s Big Bass slots series, you’ll find no wagering free spins offers on Big Bass Splash, Big Bass Bonanza, Bigger Bass Bonanza, Big Bass Day at the Races and more (all high variance games). Want more offers? The list of free spins no wagering offers also includes Book of Dead:
Best Free Spins No Wagering Offers 2025
- Bankroll Management: Set a budget and stick to it. These games can be streaky.
- Try Demos First: Learn the features in demo mode before committing money.
- Look for Free Spins Offers: Boost your play with free spins on high volatility games.
- Use Bonuses Wisely: Some welcome offers let you play these slots with bonus funds.
These slots aren’t for everyone. If you prefer frequent wins, medium or low volatility slot games are better suited. But if you enjoy chasing big wins and don’t mind the risk, high volatility slots deliver excitement like no other.
Final Thoughts
High volatility slots offer massive potential and thrilling gameplay. Whether you’re a fan of gritty Nolimit City titles or prefer classic style with Book of Dead, there’s something here for every risk-taking player. Always play responsibly and make sure to explore our top slot sites for the best experience.
Read more guides
If you want to learn more about slots, I've created plenty of guides/articles which you may find interesting:
🎰 How to Win at Slots - Slot Game Strategies
UK Slot Game Regulations Explored
Slot Volatility Explained: How Risk Levels Impact Your Slot Play
⏰ When Is the Best Time to Play Slots Online?
