Before you load Mermaid Queen for real, spend a couple of minutes on how it genuinely performs. RTG are the studio behind it, tuning the slot game for a high-variance maths model, with 95.54% RTP. It's leaning into an ocean and mermaid aesthetic and plays out on 5 reels and 40 paylines. Top wins are capped at 250,000x your stake, a genuinely massive ceiling for the patient. Originally released in 2019, it has aged well. Let's break down what works and what doesn't.
Written by Daniel Chen · Last updated: March 2026
At its core, Mermaid Queen is a slot game produced by RTG, themed around ocean and mermaid. It runs on 40 paylines across 5 reels with a high-variance maths model, and a return-to-player rate of 95.54%.
Where Mermaid Queen earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. A progressive jackpot adds a wildcard payout that can land at any time. With high variance, this one is aimed at players who can ride out the swings for the top wins. Overall it's a well-rounded slot game that knows what it is.
At 95.54%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
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.
Mermaid Queen 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.
Mermaid Queen features a progressive jackpot that grows with every spin placed by players across the network. The jackpot can be triggered randomly or through a special bonus feature, offering the chance to win a life-changing sum. The jackpot continues to grow until one lucky player hits the winning combination.
3.1 / 5 — Good
Mermaid Queen by RTG is a solid offering that delivers good entertainment value. The 95.54% RTP combined with high volatility creates a well-balanced gaming experience.