Jackpot King Slots – Best Games & Full Reviews (2026)

What Is Jackpot King?

Jackpot King (JK) is a progressive jackpot system created by Blueprint Gaming and launched in 2016 with three slots: Genie Jackpots JK, Cop the Lot JK, and Fruitinator JK.

Rather than being a game in its own right, it attaches to Blueprint’s slots, adding a progressive jackpot on top of the normal gameplay.

More than 50 Jackpot King slots are now available across the best slots sites, and Blueprint often attaches the system to its most popular titles and brands.

The pot is fed by spins across the linked games, so it keeps growing until somebody wins it. A jackpot can drop on any spin, at any stake, and that open-ended top prize is what gives these games their appeal.

How Jackpot King Slots Work

As a jackpot network, a portion of all eligible wagers across Jackpot King slots contributed towards shared jackpot pools. That means the more people playing, the larger and quicker the jackpots can grow!

While they do advertise fixed theoretical wins for regular play, the biggest Jackpot king prize has no upper limit.

And because this feature is available across a wide range of games, you can chase the same progressive jackpots while enjoying different themes and mechanics.

There are three main progressive jackpots available in the Jackpot King network, each with a different starting value and potential payout to grow into six-figure territory.

If you’re interested in how to actually trigger the Jackpot King feature, keep reading:

Best Jackpot King Slots

The best part of Jackpot King slots is that the jackpot system is tied to many of Blueprint Gaming’s best slots, with everything from classic fruit machines to officially-branded titles.

They say that variety is the spice of life, and every Jackpot King slot brings something unique to the table, whether that’s distinctive bonus features or impressive maximum wins outside of the progressive pools, giving players plenty of get excited about.

Over the years, we’ve tested tons of Jackpot King slots in our spare time and live on-stream, so we think we’re pretty well placed to share the best Jackpot King slots worth playing in 2026.

The Goonies Jackpot King

Hey, you guys! The Goonies Jackpot King brings the beloved 1980s adventure film to the reels, complete with familiar characters and a generous helping of nostalgia. There’s certainly no shortage of features outside of the Jackpot King progressive pool, with six different bonus rounds inspired by memorable moments from the film, including Super Sloth’s Free Spins and One-Eyed Willy’s Treasure, as well as the glowing Skeleton Key, too, which can activate one of seven random modifiers.

Fishin’ Frenzy Jackpot King

The fisherman has his sights set on a bigger catch in Fishin’ Frenzy Jackpot King. This jackpot slot takes the familiar five-reel, 10-payline fishing formula and adds the potential to land one of Blueprint’s progressive jackpots through the Wheel King bonus. The original’s popular Free Spins feature is still present, with Fisherman Wilds collecting the cash values displayed on fish symbols. Released in March 2020, this version has a listed 93.32% RTP.

King Kong Cash Jackpot King

King Kong Cash Jackpot King takes Blueprint’s popular gorilla-themed slot and adds the opportunity to trigger a progressive jackpot on any eligible spin. Landing three or more Kong Bonus symbols activates one of five different bonus games, including Golden Kong Free Spins and the King Kong Trail. With random modifiers also available through the Sleepy Kong feature, the amount of features crammed into this slot is enough to make you go bananas!

Eye of Horus Jackpot King

Fancy a spot of pyramid plundering? Eye of Horus Jackpot King combines classic Egyptian fruit machine themes with Blueprint’s progressive jackpot system. The familiar Free Spins round remains the main attraction outside the jackpot feature, with expanding Horus Wilds helping create winning combinations. Each Horus appearing during Free Spins can also award additional spins and upgrade the game’s higher-paying symbols, with a 94.21% RTP.

Diamond Mine Megaways Jackpot King

The mining theme and a progressive jackpot go hand-in-hand for a potential gold rush in Diamond Mine Megaways Jackpot King. Featuring up to 117,649 ways to win with the licensed Megaways engine, the game uses cascading reels to create consecutive winning combinations, while TNT Mystery Barrels can reveal matching symbols. The Free Spins has an increasing multiplier after each win, adding to the winning potential.

RTPs and Maths in Jackpot King Slots

While the headline progressive jackpot totalling up in real-time is something to keep an eye out for, there is another statistic players should keep in mind, and that’s the RTP (Return to Player).

You’ll find that jackpot-enabled games often have a lower base-game RTP than their regular counterparts – hovering at around 93%-94% on average.

That’s because a portion of eligible wagers contributes towards the progressive jackpot pools, helping to fund those enormous potential payouts. This is known as the jackpot contribution, and forms part of the game’s maths model.

Some game’s may display the base-game RTP and jackpot component separately, so we’d always advise checking this in the game’s information panel.

Volatility is another consideration, as a portion of the theoretical returns may be tied to exceptionally rare jackpot payouts. If you’d prefer games with a lower theoretical house edge, explore our selection of highest RTP slots.

Biggest Jackpot King Winners

When it comes to Jackpot King slots, many players dream of hitting that ultimate jackpot.

And since Blueprint Gaming introduced its progressive jackpot network back in 2016, some lucky players have won some huge payouts and life-changing sums of money.

The biggest publicly reported Jackpot King win came in April 2021, when a PokerStars player took home €8.13 million on Deal or No Deal Megaways Jackpot King, all with a mere €0.80 stake.

Here’s a few more of the biggest Jackpot King winners reported over the years.

Jackpot King Slots FAQs

• What is Jackpot King?

  Jackpot King is a progressive jackpot system created by Blueprint Gaming. It attaches to the studio’s slots and adds a shared jackpot that grows from spins across the linked games. More than 50 Jackpot King slots are now available, and the jackpot can drop on any spin, at any stake.
• Who makes Jackpot King slots?

  Blueprint Gaming makes them. The studio created the Jackpot King system, launched it in 2016 and attaches it to its own slots, so every Jackpot King slot is a Blueprint title.
• What is the RTP of Jackpot King slots?

  It varies by title, but Jackpot King slots carry a lower RTP than standard slots because part of each stake feeds the progressive pot. Fishin’ Frenzy Jackpot King is 93.32%, while Ted, Wish Upon A Jackpot King, Cop The Lot, Megabars and Jackpot King Prize Lines are all listed at 94%.
• How many Jackpot King slots are there?

  More than 50 Jackpot King slots are available. Blueprint attaches the system to its own titles, often its most popular ones, and the range has grown since the system launched in 2016. The jackpot can drop on any spin, whatever the stake.
• What is the biggest Jackpot King win?

  The biggest win recorded is €8,133,445.23, about £7.19 million, won by a PokerStars Casino player from a €0.80 stake on 30 April 2021. They triggered the Wheel King bonus on Deal or No Deal Megaways to claim the prize.
• Can you win the Jackpot King jackpot at any stake?

  Yes. A jackpot can drop on any spin, at any stake. The biggest Jackpot King win recorded came from a €0.80 stake, when a PokerStars Casino player won €8,133,445.23 on Deal or No Deal Megaways on 30 April 2021.
• Do Jackpot King slots have a lower RTP?

  Yes. Because part of every stake is diverted into the progressive pot, Jackpot King slots return less through ordinary play than standard slots. Fishin’ Frenzy Jackpot King, for example, has an RTP of 93.32%. Check the help screen of the game, as operators can offer different versions.
• Can I play Jackpot King slots for free?

  Yes, you can get a feel for the mechanics of Jackpot King slot in demo mode, without risking any real money. However, you won’t be able to win a prize from the Jackpot King bonus.

Which Jackpot King Slot Should You Play?

One of the best things about Jackpot King slots is that there’s something for everyone.

Blueprint has attached its progressive Jackpot King system to some of its biggest and most recognisable titles, including Fishin’ Frenzy, Ted, Eye of Horus, and The Goonies, giving players plenty of variety without sacrificing the chance to land the jackpot.

While there’s no ‘one-size-fits-all’ answer to the best Jackpot King slot, we’d recommend choosing a slot based on the theme and bonus features you enjoy the most. Since the jackpot sum is the same across all linked titles, your gameplay experience matters the most of all. You can explore our slot reviews to find out more about individual games and their mechanics.

If you’re a fan of progressive jackpots, Blueprint Gaming isn’t the only studio offering this feature. Relax Gaming’s Dream Drop jackpots provide another way to explore jackpot slots, with real-time progressive prizes reaching up to €2 million.

Remember that Jackpot King slots are still games of chance. Always gamble responsibly, stick to a budget, and never overspend to hunt the jackpot down.

If gambling stops being enjoyable, stop immediately and seek support – you can find additional resources and worldwide information on our Responsible Gambling page.