Best Jackpot Slots Online & Progressive Slot Titles

Jackpot slots are slot games with progressive jackpots that build up with every spin of the reels. The best of these jackpot games can make regular players multi-millionaires.

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What are Jackpot Slots

Jackpot Slots are the most high-risk, high-reward games in the world of real money casinos. While these slots cost above average per spin and the chance of a progressive jackpot win are extremely low, those wins, when they come, are regularly in the multiple millions.

Different Types of Slot Games

  1. Classic slots

    (3 Reel & 5 Reel)

    Classic slots are slots with an old-school design style. These 3 and 5-reel slots are normally 2D with limited animations and only a few features. Wins are normally restricted to matching symbols on a payline.

  2. Megaways slots

    Megaways slots were created by Big Time Gaming and are now available from numerous developers. These slots have reels that expand and decrease at random, meaning the number of paylines alters on every spin. At times, the paylines can expand to the hundreds of thousands.

  3. MegaSpin slots

    Microgaming’s MegaSpin slots are a series of old school feeling Vegas-style slots with a modern twist. These slots involve several reel-sets on a single screen for exciting gameplay. One MegaSpin slot is also linked to the Major Millions progressive jackpot.

  4. Mobile slots

    Mobile slots are slot games that can be played on mobile and tablet devices. Thanks to the huge increase in mobile casino play, the majority of slots are now available for mobile players. Many developers have mobile focused slots, such as the NetEnt Touch series.

  5. Multi-payline slots

    Many slots now provide multiple paylines, with 20 and above being common. High profile developers like Microgaming and Playtech provide a host of different multi-payline slots for the chance at more frequent wins.

  6. Progressive slots

    A percentage of every spin on either one progressive slot or a group of games is put towards the jackpot. As a result, these jackpots can grow to be huge, especially in the case of progressive slots from Microgaming, NetEnt, and Playtech.

  7. Vegas slots

    Vegas slots are online variations of popular slots in Las Vegas casinos. The most famous of these is IGT’s Cleopatra, but there are many more, including Da Vinci Diamonds and Book of Ra. These slots often have interesting features, colorful designs and animations, and the possibility of big jackpots.

Best Jackpot Slot Games

Mega Moolah

Mega Moolah from Microgaming is the king of big jackpot slots and is responsible for the highest win ever, at well over $21 million. A bright and fun slot with simple gameplay and an exotic animal theme, the progressive jackpot often reaches several millions. As well as the jackpot, this slot has a fun free spins feature.

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Mega Moolah ISIS

Mega Moolah ISIS is a follow up to Mega Moolah that runs on the same progressive jackpot network. With an Egyptian theme, this slot adds some new touches to the basic gameplay of Mega Moolah, including a free spins feature with added multiplayer for the chance at some nice wins outside of the jackpots.

Mega Moolah ISIS play now

Hall of Gods

Hall of Gods is one of several popular progressives from NetEnt. Based on Norse mythology, the slot has impressive graphics and animations. Hall of Gods has 20 paylines, a chance of over 4,000x your stake per spin, a free spins feature with multipliers, and, of course, a huge progressive jackpot.

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How We Rate Online Slots

We set the bar high when it comes to finding the best online casinos. To make our shortlist, a casino offering online slots must provide the following features:


You need to know that you and your money will be kept safe at all times at an online casino. To gain a place on our shortlist, an online casino must use state-of-the-art encryption technology and firewalls to ensure your security.

Game Selection

Alongside jackpot slots, the sites we recommend need to have a wide array of other gaming options. This includes a good range of video slots, various table and card games, real money slots, and more.

Exclusive Bonuses

Virtually all sites offer casino bonuses to attract new players, but we check their small print to ensure that players have a chance of clearing the wagering requirements. We’ll also look for free spins, reload bonuses, no deposit bonuses and other seasonal promotions.

Jackpot Alerts

Jackpot Alerts

The best online slots sites make it clear which games, often progressive titles, have great jackpots for players to chase. Some also highlight recent jackpots that have been won by players, which gives us an idea of how often the site boasts big wins.

High RTP

In brick and mortar venues, slots have a minimum payback (75% in Las Vegas). On this front, regulation is a little looser online. Thats why we look out for casinos offering plenty of games with high payback percentages.


We expect players to be looked after immediately if anything goes wrong. Thats why we only recommend sites with an outstanding reputation for customer service, including fast response times and swift and effective complaint resolution.

Popular Mobile Slot Games

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How do online Jackpot Slots work?

Online jackpots have a progressive jackpot that is built through taking percentages of bets made on every spin on a single slot or a network of games. These jackpots will keep building, and at some point, the highest ranked jackpot will be won, and the jackpot will subsequently drop and start building up again. Most jackpot slots have four jackpot levels, but it’s the biggest one (often called the Mega Jackpot) that makes the headlines.

Can I play Jackpot Slots online for real money?

Yes. Jackpot slots can usually only be played at real money casinos. It is rare to find a progressive jackpot slot with a free play option as these can mess up the build of the jackpot, that is created using a percentage of every bet. Progressive jackpot slots cost more per spin than most other online slots, but when you consider the potential (if exceedingly rare) payouts, it is easy to see why.

What are the best sites for Jackpot Slots?

The best sites for online progressive jackpot play are, obviously, those with the widest selection of games, but theres more to it. When youre dealing with massive jackpot potential, you want to know that a site can be trusted, and that payouts are swift, and available via a range of quality banking methods for both deposit and withdrawal. Check out our recommended list for the best sites for jackpot slots.

What are the best online Jackpot Slot games?

There are numerous online progressive jackpots to choose from. The most popular are those from Microgaming (Mega Moolah, Mega Moolah Isis, etc.), NetEnt (Hall of Gods, mega Fortune, Mega Fortune Dreams, and more) and Playtech (The Age of Gods Series). All three of these developers have seen their progressive jackpot slots make many a millionaire.

Are there examples of people winning massive jackpots on online slots?

There are numerous examples of people winning huge amounts through online progressive jackpot slots. The biggest win was a staggering $21.7 million on Mega Moolah, won by an anonymous player at Grand Mondial Casino. Mega Moolah also holds the second best, a Canadian playing scooping over $20 million at Zodiac Casino. Only slightly behind is the third biggest, belonging to NetEnt’s Mega Fortune, and snapped up at Paf Casino.

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 Casinos to Avoid - Blacklisted Casinos

There is a big difference between the best and worst in the online casino world. While many casinos are excellent, others go the other way. Casinos that have question marks around issues like trust and payout times are placed on our blacklist.


Captain Jack has been operating for a decade, but experience does not necessarily relate to quality. This casino has gained a reputation for very slow payment times when it comes to its withdrawal processes. There have been reports of the site taking over a month to make payments in some cases. For that reason, Captain Jack Casino is not recommended.


All Star Casino was once a well reputed site under the Club World Group banner. However, All Star changed direction in 2016 and is not run by personally who have been responsible for questionable online casino in the past. Safety and security of you and your money cannot be guaranteed when playing at All Star, and for this reason we do not recommend this casino.