25 Best Slot Machines to Play at the Casino

Author: Joseph Havens Updated:
Best Slot Machines to Play

Online slots have become a favourite among punters. And as the competition in the iGaming industry increases, operators offer popular slot machines with special features such as stunning visuals, jackpots, and unique themes that provide an unmatched gameplay.

For experienced slots gamers, an essential feature of a casino slot game is its RTP percentage. It helps them gauge the win rate they expect to achieve. Slots that offer the highest potential winnings have a return percentage of 97% to 99.5%.

The best slot machines to play at the casino are often found on high-quality slots sites in the online environment. They may be accessed using a deposit, demo mode, or promotion. Let’s review the most popular slot machines with the highest return to player rate.

1. Mega Joker – RTP 99% – NetEnt


To kick-start, our list is this old-school slot, largely available on Canada’s excellent NetEnt casinos. Mega Joker has a staggering 99% RTP thanks to its unique Supermetre feature. The maximum line payout of this game is 200x a player’s bet.

Its progressive jackpot is randomly triggered. The joker symbol rewards players with a secret win of up to 400 coins when a player gets three jokers in a row.

2. Ugga Bugga – RTP 99.07% – Playtech


Developed by Playtech, Ugga Bugga is not your regular slot game. While it comes with a massive 99.07% RTP, this slot machine has low volatility meaning that payouts are small but frequent.

Ugga Bugga has a unique layout with icons appearing on a 10×3 grid. Getting multiple wild symbols on the ten paylines triggers a winning combination that generates 1,000x the stake in maximum payout.

Punters can play Ugga Bugga for longer than they paid for using secure Playtech bonuses. Providing a bet range of £0.10 to £250, punters can stand a chance to win a maximum jackpot of £250,000.

3. OOH AAH Dracula –  RTP 99% – Barcrest-SG Gaming


Ooh Aah Dracula by Barcrest is a ten payline slot built on a 5×3 reel grid with 16 different ways to win, a high-roller button, and rewarding bonus features. With betting ranges stretching from 0.01 to 50, gamers can win a maximum of 250,000 coins.

Here’s why this game is an example of what slot machines win the most. The RTP percentage for the base game stands at 96%, but if punters opt for the High Roller bonus, the RTP goes all the way to an impressive 99%.

4. Monopoly Big Event – RTP 99% – Barcrest


This sensational online slot from Barcrest takes place on five reels that have 20 active paylines. The payouts of this slot vary depending on the type of wager places (below £2, above £2, or Big Bet Spins), with the highest payout being £250,000.

The theoretical RTP during Big Bet Spins is 99%. Bets below £2 have a return of 94%, while those above £2 have a return rate of 96%.

5. Jackpot 6000 – RTP 98.8% – NetEnt


This is an old-school slot with basic gameplay featuring five reels, three rows, and a familiar classic slot appearance. While it may not appear very exciting, its RTP makes it attractive and among the best slots machines to play at the casino.

Playing maximum coins can trigger the Supermetre bonus. The Supermetre feature offers rewards of up to 6,000 coins when two jokers land on the reels to reveal a mystery box.

6. 1429 Uncharted Seas – RTP 98.5% – Thunderkick


Right on Jackpot 6000’s tail is 1429 Uncharted Seas. This travel-themed slot game boasts an impressively high RTP of 98.5%. The game features five reels, three rows, 25 paylines, free spins, and expanding Wilds.

If you are wondering what slot machines win the most, this is among the best slot machines. Additionally, it has low volatility, which is excellent for punters with a smaller bankroll.

7. Marching Legions – 98.12% – Relax Gaming


Marchig Legions packs a great RTP value of 98.12%, making it one of the best slot machines to play at online casinos.

The slot game revolves around a 5-reel, 243 ways grid and offers gamers wins as high as 10,000 times their stake.

8. The Catfather – RTP: 98.1% – Pragmatic Play


Interested in what it would be like to have the mafia run by cats? You can find out in this quirky slot machine from Pragmatic Play!

The Catfather is among the popular slot machines in Pragmatic Play’s portfolio, having the highest payout rate. In addition, this slot comes with free spin rounds, stacked wilds, and win multipliers. Hence, it should come as no surprise this widely-popular slot will be available on several new Pragmatic Play casinos.

9. Joker Strike – RTP 98.11% – Quickspin


Joker Strike is among the best slot machines to play from Quickspin. This classic fruit-themed may not be the most attractive or creative option, but it is ideal for potentially lucrative wins.

The slot comes with a traditional card-suit format and a basic 96.4% RTP. Its Hi Roller activates big wins, and striking it lucky raises the RTP to 98.11%.

10. Rainbow Riches Reels of Gold Barcrest – RTP 98% – SG Gaming


Another slot machine from Barcrest is part of the popular slot machines series, Rainbow Riches. The return rate of this game varies according to how bold punters are in their bets.

Any wager under £2 generates a 92% RTP, bets higher than this steadily raise the rate to 96%, while the highest stakes will push the rate to 98%.

What’s more, Rainbow Riches Reels of Gold features a jackpot of 500x a player’s bet and 100 different paylines, placing it among the best slot machines to play at the casino.

11. Blood Suckers – RTP 98.00% – Netent


Another slot that can earn players a decent payout without damaging their budgets is Blood Suckers. Released eight years ago, the slot’s interesting theme and high 98% RTP has endeared it to slot players.

The game features 25 paylines on a 5×3 grid and has low volatility. Gamers can wager between £0.25 and £50 and get a maximum payout of 30,000 coins.

12. Jokerizer – RTP: 98% – Yggdrasil Gaming


Yggdrasil’s premier slot has a whopping 98% RTP but with a high variance. This slot is set apart from the rest by 10 paylines that pay both ways.

Mystery Wins are an addition that can spice up a punter’s win, not to mention the three Jokerizer symbols that can net gamers a mystery win between 1,000 and 6,000.

13. Rainbow Riches Pick n Mix – 98% RTP – Barcrest


Rainbow Riches Pick n Mix is yet another sequel to Barcrest’s Rainbow Riches game. The slot has a 3×3 reel set, 20 paylines, and the bet sizes available range from 1p to £5.

The more gamblers play it, the more likely they are to strike winning combinations. This can be achieved without paying by claiming free spins no deposit deals.

However, its 98% rate offers gamers a chance to get lucrative wins, not to mention the mega spins and bonus games.

14. Ragnarok – RTP 98% – Genesis Gaming


Ragnarok has a nicely-done layout that features twenty-five paylines, three rows, and five reels based on a Nordic’ end of days’ theme.

Wondering why this is part of the top popular slot machines? Here’s the answer! Gamers can bet as low as £0.01 and as high as £50 and may win the 1000x base game jackpot.

15. Starmania – RTP 97.87% – NextGen Gaming


NextGen developed this sci-fi-themed slot with a 5-reel, 3-row and 10-payline set up, which is fair for a video slot. Its paylines pay both ways providing multiple winning chances.

The slot’s RTP sits at 97.87%, and there are stacked wilds and free spins bonus features to increase a player’s winnings

16. Kings of Chicago – 97.8% – NetEnt


This unique slot game from Net Entertainment combines the best elements of a video slot with classic poker. The slot is played with a deck of cards – 15 cards are dealt out to the five paylines.

Payouts are awarded when a player gets a full house, a royal flush, or a straight flush. Boasting an impressive 97.8% RTP, punters can win over 13,000 times their stake.

17. Good Girl, Bad Girl – RTP 97.8% – Betsoft


Quite an exciting slot machine this one. Good Girl, Bad Girl offers gamers variable volatility gameplay depending on the mode chosen – good mode and bad mode.

The slot has three reels, 15 paylines, and an RTP of 97.8%.

18. White Rabbit Megaways – RTP 97.72% – Big Time Gaming BTG


This Megaways truly lives up to its name with its 248,832 ways to strike a win. Inspired by Alice in Wonderland, the slot machine comes with Big Time Gaming’s special sauce – the Megaways™ mechanic.

The game has an 97.7% RTPand a grid up to 12 rows high, increasing a player’s luck and awarding wins of up to 13,000x the bet. This qualifies it among the most popular slot machines.

19. Zeus Lightning: Power Reels – 97.73% RTP – Red Tiger


With seven reels with six symbols each, gamers will be playing on 30 winning paylines with an impressive 97.73% RTP.

Players can trigger a bonus game for a chance to win up to 20 free spins.

More Zeus symbols are included in the reels during the bonus round, triggering symbol upgrades, expanding symbols, and winnings of up to 5,037x the bet.

20. Golden Tour – RTP is 97.71% – Playtech


Powered by Playtech, Golden Tour is a golf-themed slot machine that features a 5×5 setup and a 97.71% RTP rate.

The game has a bonus feature that, when triggered with four or five scatters, creates a 3x or 10x multiplier to a gamer’s winnings, respectively. Filling the reels with wild in the base game rewards a punter 2,000x their total stake.

21. Devils Delight – 97.6% – NetEnt


NetEnt’s Devils Delight is a medium/high variance game and one of the best slots machines to play at the casino based on the seven deadly sins.

It has several bonus features that offer lucrative wins, including a reward up to 1,000 times a player’s stake.

22. Wolfpack Pays – RTP 97.5% – NextGen


This slot from NextGen gaming is one of the best slot machines to play at the casino, and for a good reason. In addition to its impressive 97.5% RTP, it rewards punters a free spin with every win.

A Wolfpack feature is activated on a player’s fourth Free Spin and awards them free bonus games.

23. Jack Hammer – RTP 97.1% – NetEnt


Jack Hammer is a crime and adventure-themed slot captured in a comic book style. It comes with an impressive 99 bet lines providing bettors with plenty of winning opportunities.

The slot also features sticky wins, wild substitutions, and free spins, all of which help punters win big. With a betting range of £0.1 and £1.00, gamers stand a chance of winning up to 250,000 coins.

24. Steam Tower – RTP 97.04% – NetEnt


This slot game from NetEnt is set on a 5×3 grid and features 15 betlines, free spins with an increasing multiplier, and stacked.

Gamers can bet with a coin value from £0.01 to £1.00, and playing with a maximum bet can trigger the top jackpot of 300,000 coins.

25. Halloween Fortune – RTP 97.06% – Playtech


Every year, countless gamblers seek to experience the most haunting Halloween slots from the world’s biggest providers. With five reels and 20 paylines, Halloween Fortune is a high variance video slot that balances between frequent wins and lucrative prizes.

It has a generous 97.06% RTP and a jackpot capped at 10,000 credits, making it one of the best slots machines to play at the casino.

Popular Slot Machines With the Highest Odds of Winning

There are a few ways in which you can increase your chances to win at slots. But the number one fact remains that the best slot machines to play are those with higher Return to Player.

Gamblers looking to test their luck can try them out for real money. But many are also among the top free casino games online. So, it’s a great idea to get familiarized with exciting bonus features and variety of symbols to increase your opportunities of striking a jackpot!

Best slot machines & their RTP

Slot game RTP Provider

Mega Joker



Ugga Bugga



OOH AAH Dracula


Barcrest-SG Gaming

Monopoly Big Event



Jackpot 6000



1429 Uncharted Seas



Marching Legions


Relax Gaming

The Catfather


Pragmatic Play

Joker Strike



Rainbow Riches Reels of Gold


Barcrest-SG Gaming

Blood Suckers





Yggdrasil Gaming

Rainbow Riches Pick n Mix





Genesis Gaming



NextGen Gaming

Kings of Chicago



Good Girl, Bad Girl



White Rabbit Megaways


Big Time Gaming

Zeus Lightning: Power Reels


Red Tiger

Golden Tour



Devils Delight



Wolfpack Pays



Jack Hammer



Steam Tower



Halloween Fortune