Looking for a Secret of the Mermaid review or want to try Secret of the Mermaid before playing for real? You're in the right place. Developed by Konami, Secret of the Mermaid is a high volatility slot with an RTP of 96.05% and a maximum win potential of 150,000x your stake, featuring a ocean and mermaid theme. With 15 paylines and a 5-reel, 15-payline layout, it delivers engaging gameplay.
Written by Daniel Chen · Last updated: February 2026
Secret of the Mermaid is a slot developed by Konami featuring a ocean and mermaid theme. The game features a 5-reel, 15-payline layout with an RTP of 96.05% and high volatility, offering impressive win potential for players of all experience levels.
The RTP of 96.05% 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.
Secret of the Mermaid 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
Secret of the Mermaid by Konami is a solid offering that delivers good entertainment value. The 96.05% RTP combined with high volatility creates a well-balanced gaming experience.