Licensed & Regulated Venues
Slot games offer some of the biggest prizes in online gaming — particularly progressive jackpots, where the prize pool grows with every spin across thousands of players. We list only licensed, reputable venues with strong RTP rates and fair terms.
Four of the most played progressive jackpot slots — all at licensed venues
The world's most famous progressive jackpot slot and a proven millionaire maker. Mega Moolah's Wheel of Fortune bonus feature has paid out some of the largest online slot prizes ever recorded — including multiple world records.
Play Mega Moolah →
A visually stunning Norse mythology-themed slot from NetEnt. Hall of Gods features a compelling bonus round where smashing shields with a hammer reveals jackpot prizes — including a life-changing mega jackpot.
Play Hall of Gods →
The original luxury lifestyle slot — yachts, champagne and supercars set the scene for one of NetEnt's most iconic games. Mega Fortune holds a Guinness World Record for the largest online slot jackpot ever paid and remains one of the top three biggest slot payouts in history.
Play Mega Fortune →
A Microgaming classic with a military theme and one of the most frequently triggered progressive jackpots in online slot history. Major Millions is well regarded for paying out its jackpot regularly, making it a favourite among progressive jackpot hunters.
Play Major Millions →The modern slot landscape — there's something for every kind of player
The original slot format — simple, fast, and nostalgic. Three reels with traditional fruit and bar symbols. Ideal for players who prefer straightforward gameplay without complex bonus rounds.
The most common format today. Five reels with multiple paylines, rich graphics, bonus rounds, free spins and special features. The majority of branded and progressive jackpot games use this format.
A newer format offering more reels, more paylines and greater prize potential. Six-reel slots often incorporate innovative mechanics like Megaways, which can create hundreds of thousands of ways to win on every spin.
The most exciting category. A small portion of every bet feeds a shared jackpot that grows continuously until one lucky player triggers it. Prizes regularly reach millions of pounds, making these the most rewarding slots available.
Licensed from films, TV shows and franchises — Game of Thrones, Monty Python, Jurassic Park and hundreds more. Branded slots combine familiar entertainment with slot gameplay, making them instantly engaging for fans.
The cutting edge of slot gaming. 3D slots offer cinematic-quality graphics and immersive storytelling, while VR slots let you step inside the casino environment using a headset. Quality VR slot venues are available now.
Why they pay the biggest prizes — and what to look for
Every time a player spins a progressive jackpot slot at any participating casino, a small percentage of their bet is added to a shared prize pool. This pool grows continuously across thousands of players at hundreds of venues — which is why jackpots can reach tens of millions of pounds.
When the jackpot is triggered — usually via a specific bonus game or random event — the entire accumulated pool is paid to a single winner. The jackpot then resets to its seed amount and begins growing again.
While the odds of hitting a progressive jackpot are long, the return to player (RTP) rates on online slots are generally better than land-based casino equivalents — making online the smarter choice for jackpot hunters. You can play any of the featured games above for free before committing real money, giving you a feel for the game without any risk.
Understanding return to player before you spin
RTP (Return to Player) is the percentage of all wagered money that a slot is designed to pay back over time. A slot with 96% RTP will — in theory — return £96 for every £100 wagered over a very large number of spins. It is a long-term statistical average, not a guarantee for any individual session.
Progressive jackpot slots often have a slightly lower base RTP because a portion of each bet feeds the jackpot pool. This is the trade-off for the chance at a life-changing prize. If you are playing for entertainment rather than chasing jackpots, a non-progressive slot with a higher RTP may suit you better.
Explore our full games section — bingo, scratch cards and more at licensed operators.
All Games → Online Bingo → Scratch Cards →Slot games should be fun. Set a budget, take breaks, and never chase losses. Free support is available 24/7.
National Gambling Helpline: 0808 8020 133 — Free, confidential, 24/7
