Biggest Jackpot Slot Games

Updated: 7360

These are the biggest jackpot slot games available to play online. With details of which games pay huge jackpots and which online casino paid out over...

Biggest Jackpot Slot Games
Steve Madgwick Editor-In-Chief

Editor-In-Chief with 20 years experience covering the betting angles to breaking news stories. Daily slots player, Portsmouth fan and League Snooker Player

If you are new to online slot sites or Jackpot slot games, you may be surprised to find that Jackpots up to €18,000,000 have been won.

So where can you play these slot games online and which are the biggest jackpot slot games online?

The biggest online progressive jackpot slot game is Mega Moolah. There are several games in the series, all working on a 5 Reel, 3 Row format with 25 Win lines, offering a huge progressive jackpot to all players regardless of stake

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While it took five years for the world record €17.8m to be broken, Mega Jackpots are not uncommon.

Here are four jackpot slot games that have paid considerable jackpots in recent times and which UK casino sites to play them

RankingSlot NameWhere to Play
1Mega MoolahAll British Casino
2Jackpot GiantAll British Casino
3Joker MillionsAll British Casino
4Mega FortuneAll British Casino

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Let's find out more about these Jackpot Slot games, which casino apps feature them and where you can find some casino offers to get you started.

Mega Moolah ( Microgaming)

The current World Record holder is Mega Moolah from Microgaming.

Paying out over €18m to one player in September 2018 it wasn’t the only time the jackpot paid out that year. Mega Moolah has several jackpots and the biggest one, starts at €1m - It had already paid out over €5m to one player in June too!

What makes Mega Moolah so popular, and the jackpots rise so fast is how popular it is. And the reason for its popularity is that any player can win the full jackpot no matter what the stake per spin is.

Where to Play MegaMoolah?

Any online casino hosting Microgaming titles will have Mega Moolah in one of its skins available to play. EnergyCasino are one of those and have the current offer

Basic Review

The biggest progressive multi jackpot slot in the world right now. There are up to 25 lines to play. No Bonus Rounds, unless you count the random jackpot round. Free Spins starting at 15 paying x3 all wins and potential retriggers. Autoplay is also available. RTP is 88.12% That’s low!

Bonus/Free Spins

In terms of scatters or bonus rounds, I'm afraid Mega Moolah has no scatter features at all.

Free Spins are triggered from landing 3,4 or 5 symbols, awarding 15 free spins with unlimited retriggers. During free spins, all wins are awarded at x3 value.

There is a consolation x2 stake if two free spins symbols appear.

Free Spins winnings can be one of two things, disappointingly low, or ridiculously high; I've yet to experience anything in between. And it is fair to say the free spins award doesn't come round that often.


There are 4 jackpots available to be won in the random jackpot round, 

  • The mini, which seeds at 7.50 and rarely gets to 8.00

  • The Minor which hovers around 100

  • Major, sitting around 10,000

  • Mega, seeding at 1m this has paid €18m recently

A great slot in that winning the full jackpot is not dependant on stake and only reserved for the high rollers. Although it is correct to say the higher you stake (max 6.25 per spin), the more chances you are awarded to play for the jackpot


Standard reel wins can keep you playing as some can be very good, especially when the ‘wild’ lion appears. However, this is a low RTP slot, and losing runs can be both brutal and devastating for your bank.

Definitely a slot for the Jackpot hunters at any stake level but be prepared to pay!

Jackpot Giant (Playtech)

This slot paid a mega $12.3m Jackpot in October 2018 not a bad days work for someone.

With fun graphics, great looking symbols, and Wilds to boot, Jackpot Giant is a fun play, but if you want to qualify for the jackpot you will have to bet max £4 to be in with a chance

Jackpot Giant (Playtech)

Basic Review

We find a 5 column, 3-row grid of 9 different symbols. Four lower value, then 2 x Stacked Giant symbols and three higher value gem symbols. Wilds are available too

Also, there are Bonus symbols on reels 1 and 5, and Scatter Symbols, on each reel.


The GIANT Bonus is gained by landing the bonus symbol anywhere on both reels 1 and 5 - A new screen option with Five Volcanos, each containing a prize. You are awarded the flip of three coins into chosen volcanos which then spit out a prize. You can be awarded further volcanos in the game, or all five can erupt at once.

The combined value from each volcano is awarded as the bonus round prize


As mentioned this progressive jackpot is only available for players betting MAX. That is £4 per spin.

Where to Play Jackpot Giant?

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This one for high roller jackpot hunters. Standard reel wins are frequent and usually losing runs of only 3 or 4 spins can occur.

There are a lot of lower value wins below x50 which is the number of lines being played so while wins are frequent, they are often below spin value

Jackpot Giant has an OK RTP level of around 94.33% which is not bad for a progressive slot.

On the volatility scale, it ranks LOW, so is suitable for lower level players for good RTP fun or fabulous for higher staking Jackpot players

Joker Millions (Yggdrasil)

There are a good number of ‘joker’ based slots out, there but none have paid out €7.8million recently. That’s a claim to fame Yggdrasil have with their progressive jackpot slot Joker Millions, paying out to a Swedish player in November 2018

Basic Review

You either like lobby music, or you don't. It takes nothing away from the game, but you might turn it off. That said, I didn't mind it at all.

Looking at a five-reel three deep board of symbols, we have minimal symbols to play with, a total of just seven plus the jockers in fact. For this reason alone I like it.

We have five fruits, a bell and a 7 - All offering wins of a minimum 3 x line stake. Be aware we are playing 25 lines here, so we are looking for combinations of four of a kind or a five of a kind to be gaining on spins.

That said, the fun part is when you get a win, the winning symbols lock in place and re-spins occur. If additional winning symbols land, then the respins continue until they stop. This sets up some exciting winning round.

Also, there is a column multiplier whereby if consecutive columns are complete matching symbols in a win. The multiplier is equal to the number of consecutive columns filled left to right.

Bonus/Free Spins

No bonus or free spins rounds specifically, the free spins and bonus are the respins when a winning combo is landed increasing the chance of growing the reel win

Where to Play Joker Millions

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The jokers themselves have no winning value unless one appears on each reel which triggers the jackpot spin. An amount is then revealed under each joker. The game continues as above and as long as more jokers appear with each spin adding more prizes.

The progressive jackpot is landed if all 15 jokers are revealed


Minimal symbols in play, regular respins and increased win and frequent enough jackpot spins make this an enjoyable, progressive jackpot slot to play with a straightforward format. May not suit the feature hungry players, but overall an excellent prog jackpot slot game with a favorable theoretical 94.3% RTP

Spin bet size does provide a proportional probability for the jackpot

Mega Fortune (NetEnt)

NetEnt joins the progressive jackpot lot party with their Mega Fortune slot. A jackpot of just under €6m was won in July 2018. That win still pales into insignificance against this former world record holder, when it paid a massive €17.8m back in 2013

Basic Review

With a couple of smaller jackpots as well, Mega Fortune can appeal to both high and low staking slot gamers and has a favourable RTP of 96.6%

Once again we have a 5x3 reel grid with 25 bet lines.

There are eight symbols paying between x3 coin up to x1000 across 3-5 of a kind reel wins.

The game also features wild symbols which do what wild symbols do but also pay for two consecutive

Also, there are Bonus and scatter symbols too

The permutations are quite high in comparison with Jokers Millions above

Bonus/Free Spins

Three or more scatter symbols activate the free spins feature. Two or more scatters during free spins award more free spins. There is also an x multiplier determined by the game being played.

Three or more Bonus symbols have to be landed in succession left to right to start the bonus game. The bonus can also be won within the free spins round.

The bonus wheel consists of three wheels in one. Your first spin is the outer edge where there are prize values or an arrow to progress to the next wheel. The 2nd reel has 24 sections 2 of which are the Rapid Jackpot, and four arrows to the 3rd reel, the remainder are prize values. Hit an arrow, and you are in with a chance of the Major or mega jackpots

The 3rd and final reel has 12 sections, 1 of which is the major jackpot and won, a diamond-encrusted arrow to the Mega Jackpot, the other 10 are prize values


There is a triple Jackpot bonus game, The Rapid Jackpot, Major Jackpot and of course the Mega Jackpot.

These can be won in the Bonus game by landing a jackpot symbol on one of the reels


A lot is going on here with eight symbols, a wild bonus and scatter spots too. Retriggers seem more common then I have seen elsewhere, and last quite some time, giving an exciting feature.

Progressive Jackpot Slots FAQ's


Online Jackpot Slots FAQ's

  • How do you pick a winning slot machine?

    There is no way to pick a slot machine to play based on any evidence that is is due to pay out and guarantee a win. However, you can select which slots you play based on the return to player percentages which dictate how much of the money stakes is set to be paid back out as winnings over time. You should always be aware however that slots are designed to win against you in every single case over a duration and whilst wins can be achieved in the short term, it is impossible to win over longer periods.

  • Do slots pay more at night?

    There is no evidence to suggest that slots pay more at night than at any other time of day. However, there are many slots linked to daily or even hourly jackpots. Those paying on a daily basis do tend to pay closer to the close time at the end of the day, and thus one could argue that these slots pay more at night. 

  • What is the best time to play online casino slots?

    There is no best time to play slots as the games are set up to random number generators dictating that each spin has no bearing on the the one prior or the won to come. However, some slots at online casinos are included in daily jackpots which have to be paid before a certain value is reached or by a certain time of day. Whilst it is not guaranteed to take many hours for these jackpots to drop, they do tend to be won quite close to the closing time.

  • Which slots pay the most?

    Finding out which slots pay the most is quite easy and there are two ways to look at the question. 1. Take a look at the RTP figures for the online slots available to play. The higher the percentage the more this slot is designed to pay out against the money played over time. 2. Progressive slots pay huge jackpots and is you are looking for the life-changing win, these are the ones to play. however, huge payouts are regular but rare!

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