Most Successful Slot Titles in the World

Did you know that the original purpose of slot machines in US casinos was to keep ladies occupied while their boyfriends or husbands played high-stakes table games?

You can play slots online or at a brick-and-mortar casino, but regardless of where you choose to play, slots remain the primary source of revenue for most establishments – play now at UKSlotGames.

As its popularity has increased over the years, they have developed to meet the needs of its customers. Some newer slot machines pay homage to vintage fruit machines like one-armed bandits. In contrast, others have cutting-edge features like cascading reels, bonus rounds, and the top-rated Megaways mechanics.

Let’s look at how some of the most popular slot games in the world have changed over time.

The Highest Rating Online Slot Machines

We have developed a list of the most lucrative online slot machines after analyzing the payout rates of hundreds of different slots. To begin, we’ve chosen the slot with the highest return to player (RTP) and the most frequent payouts.

1. Book of 99 (RTP: 99%)

The Book of 99 is one of the greatest slot machines available. In addition, it offers the greatest return on investment (ROI) of any online slot machine, reaching a stunning 99%. There is a bonus collecting feature, striking visuals, and the typical expanding bonus symbols in the free spins bonus round. The highest payoff is a whopping 12,075 times the stake, and the volatility is relatively high.


2. Mega Joker (RTP: up to 99%)

Netent’s Mega Joker is a traditional fruit machine with a retro feel. It has five pay lines, hidden rewards, and fruit and bell symbols. With a 99 percent payout rate, this online slot machine is one of the best. In the so-called “super mode,” a bonus-boosted wagering game, the RTP reaches 99%.

3. Jackpot 6000 (RTP: up to 98.9%)

The original slot machine from NetEnt now occupies a spot on our list. The Jackpot 6000 game has a payout percentage of up to 98.9% in Supermeter mode, although this option is only available if you win the original game. You can earn up to 6,000 coins in a single spin if you get two or three jokers on the wheel.

4. Monopoly Big Event (RTP: 99%)

It is one of Barcrest’s best-paying slots in 2024, with unique features, amazing bonuses, and the highest rate of return for players on an online slot machine. It should be noted that the RTP of 99% only applies while playing Big Stake mode with a maximum bet on five Enhanced Spins. This slot game has sticky wilds, multipliers, additional wilds, and free spin bonuses. When finding a high-stakes slot machine with the best RTP, Monopoly Big Event is your best bet, hands down.

5. Joker Strike (RTP up to 98.11%)

Joker Strike is the sequel to Quickspin’s famous Second Strike slot machine. Because of its high payout percentage and exciting gameplay, Retro Joker Strike is one of the most popular slots in the industry. With the addition of High Roller betting and a Wild Strike feature that gives you up to 10 additional Wilds, you’ll be able to win even more.


6. Blood Suckers (RTP: 98%)

The first of several Netent slots on our list of the greatest slots is Blood Suckers. With a 98% RTP, Blood Suckers is a popular and well-rated slot game. One of Netent’s most popular slots is a 25-line machine with a vampire theme. Besides the fast-paced action and a few exciting extra features, the game includes free spins and a pick-up feature where you unlock coffins and fight the undead to earn big prizes.

7. 1429 Uncharted Seas (RTP: 98.6%)

1429 Uncharted Seas has a maritime adventure theme and is visually stunning. As soon as you begin playing, you’ll be rewarded with free spins and increased rewards, thanks to expanding wilds. Video slot 1429 Uncharted Seas is among the best out there now. It’s one of the top online slots with an RTP of 98.6%.

8. Big Bang Theory Slot (96.01%)

If you are a fan of the hit TV show, then this is the slot machine for you! Big Bang Theory slot has 5 reels and 243 pay lines with an RTP of 96.01%. The starting bet is 0.30 coins, and the largest possible amount to bet is 150 coins. The characters from the TV show appear as symbols on the reels, and when they form winning combinations, they perform their iconic moves! There are free spins, multipliers, sticky wilds, and more in this entertaining game that can be played on mobile devices or computers. This game is bound to have you laughing out loud as you spin the reels in hopes of hitting the jackpot!

9. Piggy Payout Slots (95.42%)

Piggy Payout is set on a farm in the English countryside, where farmers Daisy and Dandelion work hard to make sure their animals are happy and healthy. They even have three pet pigs – Lulu, Lucky, and Oink – which are the symbols used in this cute animal-themed video slot machine from Eyecon. There are three jackpots to be won – Mini, Midi, or Maxi – and there are also exciting features such as multipliers and free spins.


10. Book of Ra Deluxe (95.10%)

This slot machine from Novomatic has been around for a while but continues to remain popular with players because it offers big wins and exciting gameplay. Book of Ra deluxe has 5 reels and 10 pay lines with an RTP of 95.10%. The minimum bet amount is 0.40 coins, and the maximum bet amount is 80 coins per spin. Players help Indiana Jones uncover ancient treasures in Egypt in this classic adventure-themed slot game.

11. Cleopatra (95.02%)

Cleopatra is a classic IGT slot machine that offers players an RTP of 95.02%. It has 5 reels and 20 pay lines with a minimum bet amount of 0.20 coins and a maximum bet amount of 60 coins per spin. This ancient Egypt-themed slot machine features Cleopatra herself as the wild symbol, and it includes free spins and multipliers for big wins!

12. Bang the Bank Slots (94.90%)

This is a highly volatile game with a very high hit frequency of 27.9%. The highest possible payout is 10,000 times the stake! Bang the Bank has an intriguing plot: players help Lucky Ned escape jail and get his hands on some stolen gold. It can be played on mobile devices with either iOS or Android operating systems as well as all computer browsers. This slot machine features 5 reels and 25 pay lines, and it has a 94.90% RTP. Bang the Bank includes free spins and multipliers that offer big wins!



There you have it! The most successful slot titles in the world. If you’re looking to try your luck at online slots, these are some games you’ll want to check out. With their fun themes and exciting gameplay, they’re sure to keep you entertained for hours on end. So what are you waiting for? Give them a spin today!

About Courtney Corbett

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