Which Games Paid Out Millions and Where to Play Them
Progressive Jackpot Slots UK, Which Games Paid Out Millions and Where to Play Them
Four progressive jackpot networks have produced every verified million-pound win from a UK online casino in the last decade. Mega Moolah, Hall of Gods, Jackpot King and WowPot. This guide covers what each network is, which UK-licensed casinos carry each one, the minimum bet that qualifies you for the jackpot, and the real UK wins each has produced. None of them require maximum bet play to win.
All four work the same way. Every qualifying bet, from every player, at every casino carrying the game, sends a small percentage into a shared pool. That pool keeps growing until one spin randomly triggers the jackpot event. Whoever is spinning at that moment gets the lot, regardless of how much they staked.
Jon Heywood won £13.2 million on Mega Moolah from a 25p bet. Neil from Aberdeen won £6.3 million on Hall of Gods on his first ever deposit. Michael Clark won £5.4 million on a Jackpot King slot from £1.40. Arron Freeman won £11.5 million on Mega Moolah from £1.50. None of them were betting big. The full UK gambling wins guide covers each story in detail.
One thing worth flagging before you read the network breakdowns: progressive jackpot slots have lower base RTPs than regular slots because part of every bet feeds the jackpot pool rather than ordinary spin returns. Mega Moolah's 88% base RTP sounds low next to a standard slot at 96%, but roughly 5% of every bet is going into the jackpot, not lost. That is the cost of having a shot at £2 million minimum.
Mega Moolah
Mega Moolah, Games Global
African safari theme · 5 reels, 25 paylines · Launched 2006
More online casino millionaires than any other game. Over €1.2 billion paid out since 2006. The jackpot starts at £2 million every time it reseeds and keeps growing from there. It has paid out over £11 million twice in the UK alone in the last ten years.
The jackpot triggers randomly during a bonus wheel round. Any qualifying spin, including the 25p minimum, can trigger it. When the wheel appears, it spins and lands on one of four prize segments: Mini, Minor, Major or Mega. The Mega segment is the rarest but guarantees the full top prize.
Jon Heywood, Betway, October 2015: £13,213,838.68 from a 25p bet. Guinness World Record for the largest jackpot payout in an online slot machine game. He had opened his Betway account 25 minutes earlier. Read the full story in our UK gambling wins guide.
Arron Freeman, Betfred, June 2025: £11,498,211.89 from a £1.50 bet. Betfred's largest ever payout in their 58-year history. Freeman is a scaffolding entrepreneur from Lowestoft. His partner suggested he try the casino after a family night out.
Mega Moolah also has variants on the same network: Absolootly Mad, Atlantean Treasures, Mega Vault Millionaire and others. They all feed the same jackpot pool and all qualify for the same top prize.
Also available at Betway (where Jon Heywood won £13.2m) and Betfred (where Arron Freeman won £11.5m) — search either site directly.
Hall of Gods
Hall of Gods, NetEnt
Norse mythology theme · 5 reels, 20 paylines · Triple jackpot (Mini, Midi, Mega)
Norse mythology theme: Odin, Thor, the Midgard Serpent. The jackpot is won in a separate bonus game where you smash shields to reveal prizes across three tiers: Mini, Midi and Mega. You cannot win the jackpot on ordinary spins; it only triggers through the shield game.
The 95.7% base RTP is higher than Mega Moolah's because the jackpot pool is smaller and resets lower. It tends to pay out more frequently, at lower peak amounts. Neil from Aberdeen's £6.3 million is a reminder that "lower peak amounts" is relative.
Neil from Aberdeen, Casumo, November 2017: £6,300,000 from a £30 first deposit. His first ever online casino session. He signed up to Casumo after seeing an advert, deposited £30, chose Hall of Gods because the jackpot caught his eye, and hit the Mega Jackpot on his first session. Casumo confirmed the win.
Available at any UK casino carrying NetEnt's portfolio. Good entry point if you are new to progressive jackpots. The bonus game is simple, the rules are clear, and 20p gets you in.
This is the game Neil from Aberdeen won £6.3m on at Casumo in 2017 — his very first online casino session.
Jackpot King
Jackpot King, Blueprint Gaming
Network of 50+ Blueprint titles · King Jackpot + Jackpot King tiers · Any qualifying spin enters the pool
Jackpot King is different from the others. It is not a single game. It is a feature that runs across 50+ Blueprint Gaming slots. King Kong Cashpots, Deal or No Deal, Eye of Horus, The Goonies and dozens more all feed the same pool. Any Blueprint slot with the Jackpot King badge counts. You can switch between them freely and your chances do not change.
When the jackpot fires, a bonus wheel decides whether you win the King Jackpot (lower tier) or the Jackpot King (top prize). Three confirmed UK wins above £2 million from this network in the space of eighteen months. Michael Clark, a north London accountant, and a Manchester woman. All from stakes under £2.
Michael Clark, Betfred, January 2023: £5,400,000 from a £1.40 spin on King Kong Cashpots. Betfred's largest ever payout at the time, later exceeded by Arron Freeman. Clark was a care worker from Newcastle, father of three, engaged for seven years. His mates called him Micky Millions.
Anonymous woman, Grosvenor, August 2024: £2,400,000 from a £1 bet on a Jackpot King slot. Grosvenor confirmed the payout.
Anonymous accountant, Betfred, October 2024: £4,300,000 from a £2 spin on Deal or No Deal Bankers Boost Jackpot King. Her first time playing slots. She normally bet on horse racing on Saturdays. Betfred's Fred Done called her personally to congratulate her.
Michael Clark (£5.4m) and the north London accountant (£4.3m) both won at Betfred. Search Betfred directly if that's where you want to play it.
WowPot
WowPot, Games Global
Launched 2020 · Successor to Mega Moolah-scale payouts · Growing network of titles
WowPot has quietly produced the two biggest online casino jackpot wins ever recorded, both larger than Jon Heywood's Guinness World Record. Games Global have not submitted either for certification. It runs on the same network as Mega Moolah and tends to sit for longer before dropping, which is why the peak payouts are higher.
Anonymous UK player, April 2021: £15,183,085 on Book of Atem WowPot. Games Global confirmed the payout. Larger than Jon Heywood's Guinness record but not submitted for certification, which is why Heywood's win officially still stands.
Anonymous winner, December 2023: Approximately £33.6 million on Wheel of Wishes WowPot. Games Global confirmed the payout. The largest online casino jackpot ever paid, though again not submitted for Guinness certification.
WowPot games include Book of Atem WowPot, Wheel of Wishes, Sisters of Oz WowPot and a growing number of others. Same operator as Mega Moolah (Games Global), same kind of random trigger, much larger potential payouts based on current evidence.
Side by side
| Network | Operator | Min bet | Jackpot seed | Base RTP | Biggest UK win |
|---|---|---|---|---|---|
| Mega Moolah | Games Global | 25p | £2,000,000 | 88.12% | £13.2m Heywood (2015), £11.5m Freeman (2025) |
| Hall of Gods | NetEnt | 20p | Varies | 95.70% | £6.3m Neil Aberdeen (2017) |
| Jackpot King | Blueprint Gaming | From 10p | Varies | Varies by title | £5.4m Clark (2023), £4.3m accountant (2024) |
| WowPot | Games Global | From 50p | £2,000,000 | Varies by title | £15.1m UK player (2021), ~£33.6m anon (2023) |
A few things the same across all four
None of them care how much you stake when it comes to triggering the jackpot. A 25p spin on Mega Moolah has exactly the same shot at the bonus wheel as a £5 spin. Bigger bets contribute slightly more to the pool, but the probability of any given spin triggering the jackpot is fixed and identical whatever you put in.
All four pay the full jackpot as a lump sum. No instalments, no annuity. Win £11 million and £11 million lands in your account after identity checks are done.
Jackpot wins at UKGC-licensed casinos are tax-free. The government taxes the operators, not you. Jon Heywood kept his full £13.2 million. Michael Clark kept his full £5.4 million.
The UK gambling wins guide covers what happened after each of these wins, how long payouts took, what the winners spent the money on, and whether a casino can refuse to pay.
Progressive jackpot slots have lower average returns than standard slots because a portion of every bet funds the jackpot pool. Most sessions end in a loss. These games are best approached as entertainment with a fixed budget, not as an investment. The wins described on this page are real and rare.
Frequently asked questions
What is the minimum bet to win a progressive jackpot in the UK?
It depends on the game. Mega Moolah allows jackpot entry from 25p per spin. Hall of Gods qualifies from 20p. Jackpot King slots through Blueprint Gaming qualify from small stakes on any eligible spin. WowPot games qualify from around 50p. None of the four major UK progressive jackpot networks require maximum bet play to win the top prize. The jackpot trigger is random, not weighted by stake size.
Which UK casinos carry Mega Moolah?
Mega Moolah is available at several UKGC-licensed casinos including Betway and Casumo. Betway is where Jon Heywood won the Guinness World Record £13.2 million jackpot in 2015. Betfred also carries Mega Moolah. Arron Freeman won £11.5 million there in June 2025. The game is operated by Games Global and runs across their partner casino network.
What is the difference between Mega Moolah and WowPot?
Both are progressive jackpot networks operated by Games Global. Mega Moolah has been running since 2006 and has produced more millionaires than any other online slot, with a £2 million jackpot seed. WowPot launched in 2020 and has produced larger individual payouts. A UK player won £15.1 million on Book of Atem WowPot in April 2021, and an anonymous winner took approximately £33.6 million on Wheel of Wishes WowPot in December 2023. WowPot jackpots tend to accumulate larger before dropping.
Does the jackpot size affect your chances of winning?
No. Progressive jackpot triggers are determined by a random number generator. A jackpot that has been building for months is not more likely to drop than one that dropped last week. The size of the jackpot does not affect the probability of winning on any given spin. The only thing that changes with a larger jackpot is the potential return if you win.
Can you win a progressive jackpot on bonus spins?
This varies by casino and by the specific bonus terms. Some UK casinos restrict jackpot eligibility on free spins or bonus rounds. If winning a jackpot during a bonus is important to you, check the terms before playing. PlayOJO is notable for having no wagering requirements on winnings, which means any cash you win, including during bonus play, is real money you can withdraw without meeting a playthrough target.
Why is Mega Moolah RTP only 88%? Is that bad?
It looks low because it is low on the base game. But roughly 5.3% of every bet placed on Mega Moolah goes directly into the four progressive jackpot pools rather than into ordinary spin returns. That 5.3% is not lost. It accumulates and eventually pays out as the jackpot. The remaining base game RTP runs at around 88%. If you play Mega Moolah purely for regular spin returns it is poor value. If you are playing for a shot at the jackpot, the 88% base RTP is the cost of entry into the jackpot pool. Hall of Gods has a 95.7% base RTP because its jackpot pool is fed at a lower rate. The trade-off is a smaller peak jackpot.
Is a progressive jackpot more likely to pay out if it hasn't dropped for a while?
No. This is one of the most common misconceptions in slot play. The jackpot trigger on Mega Moolah, Hall of Gods, Jackpot King and WowPot is determined by a random number generator. Every spin has the same probability of triggering the jackpot event regardless of when it last paid out. A jackpot that has been building for eight months is not "due". It has the same odds on every spin as it did the day after the last winner. The only thing that changes as the jackpot grows is the potential return if you do win.
How does the Mega Moolah jackpot wheel work?
The jackpot wheel in Mega Moolah is a separate bonus feature that can trigger randomly on any spin. When it triggers, a large wheel appears with coloured segments representing the four jackpot tiers: Mini, Minor, Major and Mega. The wheel spins and lands on one segment. The Mega Jackpot segment is the smallest on the wheel and represents the rarest outcome, but it guarantees the full top prize, starting at £2 million. Landing on any segment guarantees a jackpot win at that tier. You cannot trigger the wheel deliberately and you cannot influence where it lands.
What is a seed amount and why does the jackpot reset to £2 million after someone wins?
The seed is the minimum guaranteed starting value of the jackpot after a win. When Mega Moolah pays out, the jackpot immediately resets to £2 million rather than zero. The seed is funded by Games Global, the network operator, and is separate from player contributions. It means the jackpot is always worth at least £2 million the moment it reseeds. WowPot uses the same £2 million seed. Hall of Gods and Jackpot King have lower seeds that vary.
What is the difference between a progressive jackpot and a must-hit-by jackpot?
A must-hit-by jackpot has a visible upper limit. The prize must drop before reaching a certain amount. This makes the jackpot predictable in range, though not in exact timing. Mega Moolah, Hall of Gods, Jackpot King and WowPot are not must-hit-by jackpots. They have no upper cap. The jackpot can keep growing indefinitely until a spin randomly triggers it. Must-hit-by jackpots are typically found on lower-stakes, faster-cycling games. The major UK progressive networks are pure random-trigger. There is no ceiling and no guarantee of when they will drop.
What percentage of each bet goes into the jackpot pool?
For Mega Moolah, approximately 5.3% of every qualifying bet feeds into the four jackpot pools. This is why the base RTP sits at 88%. The missing percentage is going into the jackpot rather than ordinary returns. Across millions of players at hundreds of casinos simultaneously, this 5.3% accumulates quickly. For other networks the contribution rate varies and is not always published, but the principle is the same: a fixed percentage of every bet funds the pool.
How long does it take to get paid a progressive jackpot win in the UK?
Identity verification comes first. UKGC-licensed casinos are required to verify your identity before processing any large withdrawal. This is standard, not a delay tactic. On a very large win, the casino will typically contact you directly rather than processing it as a normal withdrawal. For Mega Moolah wins at Betway and Betfred, winners have reported the operator calling them to work through the payout process personally. Once verification is complete, e-wallet withdrawals are fastest. For eight-figure wins, bank transfer is the most common method. If you want the full picture on fast-paying casinos generally, our fast withdrawal casinos guide covers which operators pay out quickest.
Can a casino refuse to pay a progressive jackpot win?
Not at a UKGC-licensed casino without legitimate grounds. If a jackpot triggers and is verified by the game's RNG audit trail, and there is no evidence of fraudulent activity or bonus abuse, the operator must pay. A casino can delay payment while completing required identity and source of funds checks, but it cannot simply refuse. If there is a dispute, players at UKGC-licensed casinos have access to an Alternative Dispute Resolution service that the operator is legally required to participate in. This protection does not exist at unlicensed offshore sites.
Can you win a progressive jackpot on a mobile phone?
Yes. Multiple verified jackpot wins have been triggered on mobile devices. Mega Moolah has been won on mobile and is fully optimised for iOS and Android play. Arron Freeman won £11.5 million at Betfred on an evening after a family night out, almost certainly on mobile. The jackpot network, RTP and trigger probability are identical on mobile and desktop. The only difference is screen size.
Which progressive jackpot network has produced the most UK winners?
Mega Moolah, operated by Games Global, has produced more online casino millionaires than any other progressive jackpot network globally, with over £1.2 billion paid out since 2006. In the UK specifically, confirmed named winners include Jon Heywood (£13.2m, Betway, 2015) and Arron Freeman (£11.5m, Betfred, 2025). The Jackpot King network from Blueprint Gaming has also produced multiple seven-figure UK wins including Michael Clark (£5.4m, Betfred, 2023) and a north London accountant (£4.3m, Betfred, 2024).
Related reading
18+. T&Cs apply. Gambling should be entertainment, not a way to make money. Most players lose over time. Set a deposit limit before you start. If gambling stops being fun, free and confidential support is available on the National Gambling Helpline on 0808 8020 133, open 24 hours, or at BeGambleAware.org. Self-exclude from all UK-licensed sites through GamStop.
