Grid slots have become very popular in recent years thanks to releases like Gemix, Moon Princess, Rise of Olympus, and Viking Runecraft.

While these mentioned slots were released by the unofficial master of Grid Slots, Play’n GO – basically all other leading game studios have jumped aboard the bandwagon and launched their own high-quality grid slots as well.

Grid slots usually have the same number of reels and rows, and wins are often paid using a Cluster Pays mechanic, where a group of matching symbols touching horizontally or vertically create a win.

Top 10 Grid slots with the highest RTPs

Here you will find the ten best-paying grid slots ever released. Meaning that the average Return To Player (RTP) percentage is as high as they come.

A high RTP pays back players more long-term. In other words, the online casinos’ win margins are then lower.

However, note that most of the slots listed in this Top 10 list have been released with various RTP levels. While some casinos offer their players the highest RTP version, others don’t.

Fortunately, the CasinoWizard has made it his mission to find the best paying RTP versions so that you can always play with the highest odds if you follow the Wizard’s guidance.

10. Reactoonz (Play’n GO) – 96.51% RTP

Reactoonz from 2017 is one of the most popular, best, and classic grid slots ever released and, therefore, a great starting point for this Top 10 list.

While the best RTP version averages a 96.51% payout, most online casinos have decided to offer their players one of the lower RTP versions instead.

These average a 94.51%, 91.49%, 87.50% or 84.51% payout long term.

Playing on a lower RTP version can affect your chances of winning as you will be paid back less on average and generate fewer spins. But this is now avoidable thanks to the CasinoWizard’s efforts.

Reactoonz is a 7-reel, 7-rows slot using the Cluster Pays mechanic with a max win cap of 4,750x your bet. You can start spinning with stakes from $/€0.20 to $/€100 per spin.

The main aim is to charge all five meters to trigger the Gargantoon feature. During your progress, you can activate four different features that help you achieve more wins.

9. Fruit Party 2 (Pragmatic Play) – 96.53% RTP

Fruit Party 2, released in 2021, is played on a 7-reel, 7-rows game grid using the Cluster Pays system.

The best RTP version averages a 96.53% payout but note that there is also a 95.45% and a 94.46% RTP version of the slot out there.

Choose your online casino carefully to ensure you play with the best odds.

Max win is capped at 5,000x your stake, and bets start from $/€0.20 to $/€100 per spin.

You strive to land 3 or more Golden Fruits on the reels as these will trigger the Free Spins, which are played with wild multipliers that can reach a value of 729x.

You can buy the Free Spins in countries where allowed by paying 100x your bet size.

8. Wild Beach Party (Pragmatic Play) – 96.53% RTP

Wild Beach Party from 2022 is a reskin of the above Fruit Party 2, meaning that all the mechanics and features are the same but packaged in a different theme.

The best RTP version averages a 96.53% payout again, while two lower RTP versions are also available.

Fruits play the central role in Wild Beach Party but are based on a beach with anime-styled female characters to add something extra to the mix.

Basically, the same game as Fruit Party 2 but uses a different theme.

7. Star Clusters Megaclusters (Big Time Gaming) – 96.54% RTP

Star Clusters Megaclusters from 2020 is game studio Big Time Gaming´s contribution to this Top 10 Best Paying Grid Slots list as it averages a 96.54% payout.

Thankfully, only one RTP version of the game is available for now.

Star Clusters Megaclusters is played on a 4 to 8-reel and 4 to 8-rows game grid using Cluster Pays.

It´s possible to win up to 23,000x your stake, and bets start from $/€0.20 to $/€100 per spin.

This slot uses Big Time Gaming´s unique Megaclusters feature, where a winning combo splits into 4 smaller symbols.

The main aim is to reach the Free Spins, where the grid expands to 8×8, and the Gold Wild multipliers can reach x10 values.

6. Gems Bonanza (Pragmatic Play) – 96.55% RTP

The top RTP version of Gems Bonanza from 2020 averages a 96.55% payout, while the 95.45% and 94.53% RTP versions should be avoided.

Gems Bonanza is played on an 8-reel, 8-rows game grid using Cluster Pays where the max win is capped at 10,000x your stake. Bets start from $/€0.20 to $/€100 per spin.

There are 5 different modifiers that can be triggered during the base game and a Gold Fever Meter. The meter needs 114 winning symbols to activate the Gold Fever Bonus, where the biggest wins can be achieved.

5. Contact (Play’n GO) – 96.55% RTP

The best RTP version of Contact from 2019 averages a high 96.55% payout.

Unfortunately for us players, most of the online casinos have opted to offer one of these lower RTP versions to their players: 94.55%, 91.62%, 87.41%, or 84.66%.

That’s a difference of almost 12% between the highest and lowest RTP versions. Follow the CasinoWizards guidance to play on the best RTP version.

Contact is played on a 5-reel, 7-row game grid using Cluster Pays. Bets start from $/€0.20 to $/€100 per spin, and you can win up to 1,517x your stake. 

Due to its low max win potential, Contact has disappeared into the abyss among casino game lobbies.

Still, for casual players looking for some grid slot entertainment with a high RTP (when choosing the best version), Contact could be an excellent option.

4. Tome of Madness (Play’n GO) – 96.59% RTP

Rich Wilde and the Tome of Madness from 2019 qualify for position 4 in this list as the best version of the slot averages a payout of 96.59%, while any lower RTP versions should be avoided.

The slot offers a pretty low max win potential of 2,000x stake with bets starting from $/€0.10 to $/€100 per spin. Having said that, you can, for example, still win up to $/€10,000 with a $/€5 bet.

Tome of Madness is played on a 5×5 game grid using Cluster Pays and with great graphics and a wide variety of features, as we have become accustomed to with Play’n GO grid slots.

3. Finn and the Swirly Spin (NetEnt) – 96.62% RTP

Finn and the Swirly Spin from 2017 is NetEnt’s contribution to this Top 10 list as the best RTP version of the slot averages a 96.62% payout.

The slot created quite a lot of attention once it was released due to its different game mechanics with a spiral pattern where you need to bring a key to the center of the grid with the help of winning combinations which removes symbols and clears the path.

Once enough keys are collected, you can access the different Free Spins games.

Finn And the Swirly Spin is mainly targeted toward casual players due to its low/medium volatility setting with a max win cap at 840x stake.

2. Magnetz (Relax Gaming) – 96.66% RTP

Game Studio Relax Gaming has become a favorite among many casino players as they have released many quality slots in recent years.

While Magnetz from 2021 hasn’t received top ratings from players and the casino community, it is Relax Gamin´s best-paying grid slot.

Magnetz is played on a 3-reel, 4 to 9-row game grid using Cluster Pays. Bets start from $/€0.10 to $/€50 per spin, and you can win up to 1,000x your stake.

The low max win potential has contributed to the mixed reviews of the game but fits casual players well.

Once the BONUS word across the grid is lit, 5 Free Spins, played on an expanded 9×3 grid, are awarded.

Magnetz is exclusively offered by Unibet.

1. Jammin’ Jars (Push Gaming) – 96.83% RTP

We started this Top 10 list with a classic and will finish it with one of the best grid slots ever created.

Jammin’ Jars from 2018, with a max win potential of 20,000x your stake, is still found in most online casinos’ top lists as it’s so popular.

Check out our Jammin’ Jars slot review to find the casinos that let you play on the 96.83% RTP version while avoiding the lower 95.25% and 90.45% versions.

Jammin’ Jars is played on an 8×8 game grid using Cluster Pays. Bets start from $/€0.20 to $/€100 per spin.

The main aim is to land 3 or more Jam Jar symbols on the reels that trigger the Free Games. During the Free Games, you can increase the multipliers to crazy amounts helping you achieve huge wins.

The sequel Jammin’ Jars 2, released in 2021, offers a higher 50,000x max win cap but doesn’t come close to the original Jammin’ Jars high RTP as it is the best paying grid slot ever released.