Thinking about giving Stacks of Jacks a spin? We tested it thoroughly so you know what to expect. Developed by Gamomat, Stacks of Jacks arrives with high volatility and an RTP of 96.13%. Dating back to 2021, it remains a regular pick. If everything lines up, Stacks of Jacks can pay up to 200,000x your bet. You get 5 reels and 40 paylines, all given an engaging visual treatment. So does it deliver? Let's get into it.
Written by Michael Torres · Last updated: January 2026
Stacks of Jacks comes to us from Gamomat. Presentation-wise it's given an engaging visual treatment, and it leans toward a high-variance maths model at a return-to-player rate of 96.13%. Under the hood you'll find 40 paylines across 5 reels.
Where Stacks of Jacks earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. The high volatility means patience is rewarded — expect quiet spells broken by bigger hits. All told, it's a solid entry in the Gamomat catalogue.
The RTP of 96.13% is right around the industry average of ~96%. This represents a fair return that's in line with what most modern slots offer.
High volatility means longer gaps between wins, but when wins do land, they can be significantly larger. A bigger bankroll and patience are recommended for this type of slot.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Stacks of Jacks features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
3.0 / 5 — Good
Stacks of Jacks by Gamomat is a solid offering that delivers good entertainment value. The 96.13% RTP combined with high volatility creates a well-balanced gaming experience.