The Arabian Nights slot game was incredibly popular back in the 2010s, and with players from across the globe seeding the jackpot kitty, it was common for seven-figure jackpots to be paid out. Rounding out the top five of the largest online casino wins ever is a new game on the list. Little is known about the winner and what they did with their money, but you suspect an almighty party would have been thrown… They were playing the Absolutely Mad variant of Mega Moolah, and no doubt the individual was going bananas when they realised the extent of their win. The largest jackpot of all time was a $23.6m bonanza (around £19m) landed by one player from Belgium back in 2021. The logic is that the more popular a jackpot slot is, the quicker the jackpot will rise – and so will its size – hence its ubiquity on the list of biggest online casino payouts.

This cumulative effect sees the prize fund increase every single minute of the day until somebody, somewhere triggers the payout with the required combination of symbols. What’s a progressive jackpot slot, you may be thinking? This is a game in which all players, no matter where they are and which online casino they are using, feed into the jackpot with every spin of the reels. This is why any reputable online casino from the newest one on the market to those that have been around for years all want to have Mega Moolah in their games libraries.

Mega Moolah is a jackpot slot that will feature a few times on this list, and the reason for that is simple: it is one of the most popular progressive jackpot slots around. There aren’t many lottery draws around the world that pay out a jackpot of £19m, which explains why online casino gamers are happy to try their luck with jackpot slots instead.

Biggest online casino in the world