Mermaid’s Millions

Mermaids Millions Slot Review

Mermaids Millions is one of Microgaming's oldest online slots, first released in 2008, and it still draws players in with its colourful underwater theme and straightforward gameplay. Set beneath the waves in King Neptune's kingdom, the game features 5 reels and 15 fixed paylines, with an RTP of 96.56% and medium volatility - making it a solid pick for players who like regular wins without massive swings.

Despite its age, Mermaids Millions holds up well. The graphics lean into the classic style rather than trying to compete with modern video slots, and the game is all the better for it. There is no bloat here - just a clean, playable slot with two bonus features that give you real chances to land worthwhile payouts.

Theme and Symbols

The setting is an ocean kingdom, and the symbols match it neatly. On the reels you will find a Mermaid, King Neptune, a Treasure Chest, a Pearl in a Shell, and a Sea Horse, alongside playing card symbols styled with a nautical twist. The Mermaid and Treasure Chest are the two symbols that trigger the bonus features, so keep your eye on those.

King Neptune doubles as the Wild. He substitutes for all standard symbols and landing five of him on an active payline pays out the top prize of 7,500 coins. The audio sits comfortably in the background - underwater sounds and gentle music that fit the theme without becoming grating after a long session.

How to Play

Mermaids Millions uses 15 fixed paylines, so all lines are always in play. The betting range runs from £0.15 to £150 per spin, covering low-stakes casual play and higher-roller sessions alike. Wins pay from left to right starting on reel one, and combinations need to land on an active payline to count.

The controls are minimal - choose your bet, spin, and optionally use autoplay. There are no cascading reels, no cluster pays, and no expanding grids. What you get instead is a focused game that does exactly what it says on the tin.

This slot is available on desktop and mobile without any download required, running directly in your browser.

Bonus Features

Free Spins (Mermaid Scatter): Land three or more Mermaid symbols anywhere on the reels to trigger 10 free spins. All wins during the free spins round are subject to a 3x multiplier, which can stack up quickly on those better-than-average base game hits. Free spins can be re-triggered during the bonus round, so there is no hard cap on how many you can earn in a single activation.

Treasure Chest Bonus: Get three or more Treasure Chest symbols appearing consecutively from reel one to trigger the pick bonus. You are taken to an underwater scene and asked to select from a set of shells. Each shell hides a cash prize, and the number of picks you get depends on how many Treasure Chests triggered the feature - more chests means more picks. This bonus can return up to 7,500 coins depending on your selections.

The two bonus modes complement each other well. The free spins give you steady multiplied wins, while the Treasure Chest pick bonus can deliver a single large payout. Neither feature is overcomplicated, and both activate often enough at medium volatility to keep the session interesting.

RTP and Volatility

The published RTP for Mermaids Millions is 96.56%, which sits comfortably above average for a slot of this era. Medium volatility means the game aims to balance frequency with size - you will see regular smaller wins punctuated by the occasional bigger hit, particularly from the bonus features.

The maximum win is 7,500 coins from a single spin or bonus round. While that is modest compared to modern high-variance titles, the trade-off is a more consistent experience over a session.

Who Is This Game For?

Mermaids Millions suits players who want a relaxed, uncomplicated slot session. The theme is accessible, the features are easy to understand, and the medium volatility keeps things moving. It is a good fit for players new to online slots who want something with a bit of bonus depth without an instruction manual, and for experienced players who fancy a nostalgic classic.

If you want to explore more games from the same developer, check out our Microgaming slots page for the full catalogue of their titles available here.

Verdict

Mermaids Millions is a Microgaming classic that has aged gracefully. The 96.56% RTP, medium volatility, re-triggerable free spins with a 3x multiplier, and the pick-and-win Treasure Chest bonus give it enough substance to justify plenty of return visits. It will never be mistaken for a modern feature-heavy slot, but it was never meant to be. As a reliable, well-built underwater adventure, it does the job well.

Where to Play Mermaid’s Millions

These online casinos carry 888 Gaming games including Mermaid’s Millions. Read our MyStake review or browse all casino reviews.

Mermaid’s Millions RTP and Variance

Mermaid’s Millions has an RTP of 95.21%, which is around the industry average. See our highest RTP slots for the best returning games.

At the minimum bet of £0.15 per spin, a £10 deposit gives you 66 spins with a statistical expected return of £9.52. Read our slot betting strategy guide for tips on managing your bankroll.

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