Top 10 Slots With the Highest RTP That Can Actually Be Played Online

Book of 99 is a modern spin on an old classic released all the way back in 2005 – Book of Ra – a slot which many game developers have copied the concept of. It comes with an incredibly high RTP of 99%, making it one of the most profitable slots that exist while also being a lot of fun to play. It looks great and its features are pleasing.

Additionally, a good chunk of money can be won – up to 5,000 times the bet amount on a single spin. This is done by filling the entire screen with the top paying symbol, which is possible to do in the game’s free spin feature that grants 10 free spins. This feature is the big highlight of the game. 

• Free Spin Feature: a random symbol is selected to gain special properties. When this symbol appears, it will cover the entire reel. Additionally, this symbol does not have to be connected from left to right to pay, which is usually the case. The feature can be triggered by landing three or more wild symbols or through the bellow collection feature. 
• Collection Feature: a collection meter will fill with every wild symbol that appears in the game. When 99 wilds have appeared, the free spin feature will be triggered. 

Mega Joker is a retro-styled slot machine that brings you back 25 years in time. It’s quite a simple game with two sets of reels and a paytable that is visible right on the slot. However, it does come with two features and a very high RTP, which is why many players regularly come back to it. 

The first feature is a progressive jackpot that pays $20,000 on average. At a maximum bet size of $10, the chance of winning this jackpot is 1 in 50,000 spins. These are quite good odds. 

The other feature is a supermeter. This plays an important part of the slot’s RTP. You see, the RTP in Mega Joker is not fixed at 99%, but can be as low as 85%. To reach the highest RTP, you need to play the supermeter with an optimal strategy. Don’t worry, this is included in the game description. 

The supermeter is the upper set of reels in the game. You start by spinning on the lower set and whenever you win something, you move up to the upper section of the slot to play the supermeter. Here, the paytable is slightly different. You can collect your winnings whenever you want and move down to the lower section again. However, for the highest RTP, you must follow the optimal strategy.

Monopoly Big Event is a feature-packed slot based on the classic board game of Monopoly (just like Monopoly Live). It comes with a big bet option that is necessary to play in order to reach the slot’s amazing RTP of 99%. If you don’t, the RTP will only be 96%. The big bet option costs $20 or $30 to play and awards you with 5 spins that can come with the following three abilities:

• Epic Spins: all winnings are multiplied by x5.
• Progressive Multiplier: each spin increases a win multiplier by x1. 
• Persisting Wild: in addition to the game’s normal wild symbol, a big event symbol turns into a wild. When this appears on the reels, it will stick and remain throughout all spins. 

The game also comes with a bonus feature which is the big highlight of it. This bonus is triggered whenever three big event symbols appear on the reels. In the bonus, you get to pick cards that will grant you up to 20 free spins and unlock abilities that these spins are played with. You can experience the following:

• Sticky Wilds: all wild symbols will stick throughout the free spins.
• Dancing Wild: a random reel will be filled with wilds on each spin.
• Guaranteed Wins: a number of spins will be guaranteed to provide a win.
• In Jail: this is a special symbol that is always active in the bonus free spins. When it appears, it will remove the lowest valued symbol from the reels. In best case scenario, all low paying symbols are removed.

Jackpot 6000 is a similar but simplified version of the earlier mentioned Mega Joker. There is no progressive jackpot to be won, but the maximum win in this game is capped at 600 times your bet amount. This can be won through the slots one and only feature – the supermeter. 

Although named the same, the supermeter in Jackpot 6000 is much more basic than in Mega Joker. Whenever you get a win, you have a chance to spin with the supermeter active. This means that a joker paytable is unlocked. Landing 2 joker symbols anywhere on the reels, a random prize of 1 – 600 times your bet amount is rewarded. That’s it. 

Similar to Mega Joker, there’s an optimal strategy in the slot as the RTP of it varies from 95% – 98.9% depending on how you play. Unfortunately, though, this strategy is not included in the game. 

You must also know that the hit frequency is only 9.6% in Jackpot 6000 which means that you’re only expected to win on every 10^th spin. If you ask me, I would always play Mega Joker over this.

1429 Uncharted Seas is a modern but simple game with an eye-catching design. Its low volatility along with high RTP of 98.5% makes it one of the most predictable slots that exist today. What I mean by this is that your balance isn’t likely to drop much at all. This makes the game a perfect choice for bonus wagering. 

There are two features in 1429 Uncharted Seas which include the following: 

• Expanding Wild: a wild symbol can appear on reel 2, 3 and 4. Whenever it’s included in a winning line, it will expand to cover the entire reel. 
• Free Spin Feature: landing 3, 4 or 5 scatters award you with 10, 20 or 50 free spins. Each new scatter symbol that appears during the free spins grants additional spins.

Marching Legions is quite a cool-looking slot with 3D symbols and fancy animations. In terms of graphics, it’s definitely one of my favorites on the list. The game comes with a bonus buy feature that allows you to instantly trigger the slot’s free spin feature at a cost of 120 times your bet amount. 

However, in order to play with the slot’s maximum RTP of 98.12%, you cannot make use of this feature. In difference to most slots where feature buys tend to come with a higher RTP than spinning regularly, Marching Legions does not. Buying the feature has an RTP of 97.13%.

The features you can expect from the game include the following:

• Marching Re-Spins: the top paying symbol of the game can appear as a stack of 3 symbols. When a full stack lands on a reel to cover it, these symbols will stick and trigger re-spins. On each spin, the stack will move one reel to the left. Re-spins continue until the stack is gone. 
• Nudge: if a stack of the top paying symbol only covers two positions on a reel, there is a chance for the nudge feature to activate. This will then move the full stack onto the reel in order to trigger the Marching Re-Spins. 
• Collect to Free Spins: whenever a stack of top paying symbols walks out of the reels, a collection meter will be increased by 1. When the entire meter is filled, which requires 85 stacks of symbols to move out of the reels, a free spin feature is triggered.
• Free Spin Feature: a stack of top paying symbols will walk from the right to the left on the reels. By landing a special horn symbol, you progress through levels. There are up to 5 levels and with each, the stack of top paying symbols will become wider. At the 5^th level, they will cover the entire screen. Free spins end when all stacks have moved out of the reels.

With an RTP of 98.1%, the Catfather is the go-to slot for casino enthusiasts who love pussycats as much as they love a high return on their investments. It comes with charming graphics and a catchy melody that’s hard not to like. The volatility of the game is fairly low, which will protect your balance from sudden losses. At the same time, up to 1,600x can be won on a single spin, which is quite nice.

The top win of the game is awarded during free spins by covering the entire screen with the most valuable symbol, represented by the Catfather himself. These free spins are part of the game’s three features:

• Random Wild Feature: on any spin, reel 2, 3 and 4 can be fully turned into wilds.
• Free Spin Feature: by landing 3, 4 or 5 scatter symbols, 10, 15 or 25 free spins are awarded where all winnings are multiplied by 4.
• Win From Both Ends: the slot pays not only by connecting symbols from the left to the right as most slots do, but you can also win from the right to the left.

Joker Strike is a well-designed slot that revolves around a single, but special feature. Whenever you win with a symbol in the game, this symbol will light up in a frame around the reels. A marker will then start spinning in the frame and if it lands on the lit symbol, additional symbols will be added to the reels. This will result in more winning lines and can pay up to 1,000 times your bet. 

The game also comes with a high roller mode and to be able to play with the slot’s high RTP of 98.1%, this mode is required. Playing normally, the RTP is capped at 96.46%. 

There are three different high roller modes that cost $20, $30 and $50. The RTP of these are 97.89%, 98.02% and 98.1%. In other words, the most expensive one is the most lucrative. All of the modes award 5 spins. They come with their own unique abilities: 

• $20 mode: a wild symbol is added to the reels which is guaranteed to land on a random position, making it easier to hit a winning line.
• $30 mode: two wilds are added to the frame of the game, making it easier to hit a lit symbol when this starts spinning. The mode also comes with the wild symbol from the $20 mode. 
• $50 mode: this comes with both of the wilds from the two other modes. Additionally, a second marker will be added to the outer frame, making it easier to hit symbols on it. 

Playing the high roller mode with the highest RTP, the maximum win is 102 times the cost. In other words, the most you can win from it is $5,100.

Blood Suckers is a modern horror classic that was highly popular to play when it was released in 2009. Back then, it was the slot with the highest RTP of them all, if I’m not mistaken. Its popularity even got the slot a successor released in 2017; Blood Suckers 2. 

Today, the slot can appear a bit dated but still has a charm to it with its horrifying sound effects, high hit frequency of 44.9% and bonus game that only takes 48 spins to trigger on average. There’s also a free spin feature in the slot which on average is triggered on every 200^th spin. 

• Free Spin Feature: 10 spins are awarded where all winnings are multiplied by 3.
• Bonus Game: click to open coffins that contain various cash prizes.

Jokerizer is a simple fruit slot with the shiniest fruits you’ve ever seen. The graphics are top-notch. The game comes with two features that include a Mystery Win and Jokerizer Mode. While I have explained these below, it’s important to always play with the Jokerizer Mode when possible. This is how you reach the slot’s high RTP of 98%. If you never made use of the mode, the RTP would only be 88.8% – a huge difference. 

• Mystery Win: joker symbols can appear on reel 2, 3 and 4. When three of them appear anywhere, a mystery win of 100 – 600 times the bet amount is awarded. If the three joker symbols align in a horizontal or vertical line, 600x is guaranteed.
• Jokerizer Mode: on any win in the slot, Jokerizer Mode is activated. This is an optional feature that doubles your stake. When the mode is active, only two joker symbols have to appear to trigger a mystery win of 1 – 300 times your bet. Any mystery win above 50x ends the Jokerizer Mode.