Return to Player (RTP) is a long-term statistic, not a per-bet metric. So, a player could either walk away with £80 from a £10 bet or with nothing. Since slot machines use RNG technology, the outcome of each spin is unpredictable; nevertheless, the RTP number provides some guidance. 

So, how do you define casino online slots with a high return-to-player percentage? However, the answer to that question is subjective and will differ depending on who you ask. When it comes to us, we believe that: 

● RTPs of 98% or more are considered high.

● RTPs between 95% and 97.99% are considered mid-range or average.

● RTP below 94.99% is low. 

Marching Legions

Marching Legions is a 5-reel, 243-way slot game powered by Relax Gaming. The graphics in this Roman legion-themed slot game are top-notch, and the game itself has stacks of symbols depicting legionnaires, which can trigger free spins. Partially stacked symbols on two or more reels trigger the helpful Nudge feature, which results in Marching Stacks. The legionnaire stacks will remain on the reels throughout the re-spins until they are removed. 

Press the “Wave 1” button to activate the Free Spins bonus. To advance to the next “wave,” you must collect horns. This doubles the width of the Marching Stacks to two reels. It has a maximum win multiplier of 7,458 times the wager and a return to player percentage of 98.12%. A total of five Marching Stacks might be used in a game with five wave heights. 

Blood Suckers

Blood Suckers is a five-reel, twenty-five-pay line slot game developed by NetEnt and playable across all platforms for as low as 25 pence a spin. This 2009 release features a traditional look and feels with ominous music and a vampire theme. With this, you may expect a hit frequency of 44.9%. 

The Vampire Slaying Bonus allows players to select a coffin and open it to win monetary prizes. The Free Spins bonus is highlighted, starting with 10 free games and a 3x multiplier. It’s possible to get ten more spins for free. You can win up to 1,014.6 times your initial wager on each free spin. The expected return is 98%. 


Yggdrasil Gaming’s Jokerizer is a 5-reel, 10-pay line slot machine. Taking inspiration from traditional fruit machines, it can be played for as little as 10p each spin across all platforms. 

If you get 3 or more Joker symbols, you’ll trigger the Mystery Win feature, where you can win up to 600 times your total bet. You may win even more by playing in Jokerizer Mode.


In 2015, NextGen Gaming launched a slot machine called Starmania, which features 5 reels and 10 paylines. This space-themed win-both-ways slot game is playable on all platforms from 10p per spin. 

There’s a bonus round called Free Games where you can get up to 20 more turns. The middle three reels will gain an additional 30 stacked wilds. This improves your chances of winning the maximum possible payoff of 1,000 times your wager on any one spin. A return to player percentage of 97.87% is even more outstanding.

White Rabbit

White Rabbit Megaways is a 5-reel slot machine with a maximum of 248,832 possible paylines. This Big Time Gaming-powered Alice in Wonderland-themed slot has a Caterpillar Wilds feature that can add additional wilds with multipliers. 

Cupcake symbols can cause an expansion of the reels in the Down the Rabbit Hole Free Spins bonus up to 12 rows high for 248,832 Megaways. It gives 17,420 x stake winnings every spin at 97.77% RTP.

By Manali