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Mermaids Millions

Written by
Jeffrey Gynn
Jeffrey Gynn
Last Updated: Mar 27, 2026
Last Updated: Mar 27, 2026
Mermaids Millions 1
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Play Mermaids Millions

Quick Summary

Mermaids Millions

Featuring 5 reels, 3 rows, and 15 fixed paylines, Mermaids Millions is an underwater-themed, low-volatility slot from Games Global that is available to play right here at MetaWin Casino. After diving into the game, you'll soon discover seahorses, giant clams, and buried treasures, in addition to bonus rounds, Scatter symbols, and more. The crypto slot's maximum win is up to 1,655x your stake, primarily driven by its Free Spins round and Treasure Bonus pick game.

Mermaids Millions Introduction

Mermaids Millions was created by Microgaming (Games Global) and released in 2005, before the HTML5 version was released in 2008. When Microgaming reorganized in 2022, ownership of the game was transferred to Games Global. Mermaids Millions is a 5x3 slot with a low volatility, which means you can expect smaller but more frequent wins.

Mermaids Millions Screenshots
Mermaids Millions is a stone-cold Casino classic - it's undergone a revamp from it's original look from way back in 2005.

The visuals and sound may be a tad dated, but the game remains popular today due to its simplicity and availability of two different types of bonus games: a Treasure Bonus and a Mermaids Millions bonus Free Spins round with a 3x Multiplier.

During the base game, the idea is to land three or more identical symbols, starting at reel 1, on any of the 15 paylines. You will be paid for every winning combination you form, and not just the highest paying one.

Landing three or more Treasure Bonus symbols on a payline will activate the Treasure Bonus mini-game. It's a pick 'em-style game in which you open sunken barrels, treasure chests, and giant clams that contain random cash prizes.

If you land three or more Mermaid Scatters, you'll earn a round of Free Spins. A 3x Multiplier is automatically applied to all winnings. The King Neptune Wild is the highest paying symbol, and it substitutes for all other symbols except for Scatters.

“
Jeffrey Gynn

Author's Thoughts

Jeffrey Gynn

The visuals and sound may be a tad dated, but the game remains popular today due to its simplicity and availability of two different types of bonus games.

How to Play Mermaids Millions

If you're interested in playing Mermaids Millions, you can get started by following these 5 steps.

  1. Connect your Web3 wallet: We operate on a wallet-based login system. You don't need to create an account, since your Web3 wallet (MetaMask, Coinbase Wallet, Phantom (Solana), or 300+ via WalletConnect) acts as your identity. Simply connect your wallet to get started. Alternatively, you can purchase crypto using Visa, Mastercard, Apple Pay, or Google Pay via MoonPay right here at MetaWin.
  2. Launch Mermaids Millions: Use the search bar to immediately find the Mermaids Millions slot game. Once you locate it, simply click or tap on the game's icon to launch it. After your session, the game will be added to the "Continue Playing" section for instant access.
  3. Set your bet size: Click the icon that looks like three stacked coins to set your bet size. It's located under the spin icon to the right of the reels.
  4. Check out the pay table and rules: While the pay table is located above the reels, you can visit the game menu to examine the features and rules. Remember, the payouts you see listed are the real payouts scaled to your chosen bet size. They aren't displayed in terms of "X" values, such as 0.1x, 2x, or 10x.
  5. Spin the reels: Now that you've set your bet size and know the rules, you can start spinning the reels.

Bonus Features

Because Mermaids Millions was created way back in 2005, it doesn't offer any of the most modern features, like Cascading Reels, Hold & Win, or Cash Collect. However, it has two different bonus games.

Mermaids Millions Bonuses
Mermaids Millions Bonuses - Wilds substitutes for all except treasure bonus & scatter symbols.

Landing three or more Treasure Bonus symbols triggers the Treasure Bonus mini-game. You'll see Treasure Chests, Barrels, and Giant Clams on the screen. Each one contains a random cash prize, and all you need to do is select which ones you want to open. If you triggered the mini-game by landing three Treasure Bonus icons, then you can select 3. If you got there by landing four Treasure Bonus symbols, you can pick 4, while landing five Treasure Bonus symbols gives you 5 picks.

The Mermaid Scatter is a flexible bonus symbol. Not only does it act as a high-value pay symbol that only requires you to land two of them to win a prize, but it also triggers a round of Free Spins. If you land 3, 4, or 5 of them, you'll earn 10 Free Spins with a 3x Multiplier. You can trigger more Free Spins during the round by landing 3+ more Mermaid Scatters.

Then there's the King Neptune Wild. In addition to being the highest-value pay symbol, it also replaces all other symbols except for the Scatter. Also, you only need 2 of them to appear to earn a cash prize.

“
Jeffrey Gynn

Author's Thoughts

Jeffrey Gynn

The Mermaid Scatter is a flexible bonus symbol. Not only does it act as a high-value pay symbol that only requires you to land two of them to win a prize, but it also triggers a round of Free Spins.

Symbols and Paytable

Including the Mermaid Scatter and King Neptune Wild, Mermaids Millions features 10 pay symbols. On the low end of the value scale, the 10, J, Q, K, and A pay between 0.13x and 8.3x. At the next tier, the Seahorse pays between 1x and 16.6x, while the Giant Clam and Jewel Chest pay between 1.33x and 33.33x. Scatters offer payouts ranging from 2x up to 400x, and the King Neptune Wild offers between 0.33x and 500x.

Symbols and Paytable

Symbol2x3x4x5x
10N/A0.13x1x5x
JN/A0.13x1x5x
QN/A0.33x1.66x6.66x
KN/A0.33x3.33x6.66x
AN/A0.66x3.33x8.33x
SeahorseN/A1x5x16.66x
Giant ClamN/A1.33x6.66x33.33x
Jewel ChestN/A3.33x6.66x33.33x
Scatter2x4x50x400x
Wild0.33x13.33x133.33x500x

Tips for Playing Mermaids Millions

Let's go over a few quick tips to help you get the most out of the Mermaids Millions slot.

  1. Stake sizes: Establish a stake size that's appropriate for your session bankroll. Many players keep their stake sizes between 1% and 2% of their session bankroll.
  2. Scatters: The Mermaid Scatter acts as a pay symbol and a Mermaids Millions bonus Free Spins trigger. Unlike the other symbols that must line up correctly on a payline, the Scatter can be anywhere on the reels. While landing two of them isn't enough to activate Free Spins, it does offer a 2x payout.
  3. Loss limits: It's important to set a limit on your losses. This helps avoid overspending and losing money that you may not be able to afford to lose. Of course, you need to be disciplined enough to stick to your loss limit and walk away.
  4. King Neptune Wild: The Wild is the highest-paying symbol in Mermaids Millions. It also replaces all other symbols except for the Scatter and Treasure Bonus.
  5. Free Spins: The Free Spins round has a fixed 3x multiplier that is automatically applied to all winnings, and you can trigger more Free Spins during the round.

Mermaids Millions Pros and Cons

Pros

  • Two different types of Mermaids Millions bonus rounds
  • Since Mermaids Millions is a low-volatility slot, you can expect more frequent smaller wins
  • There is a higher-than-average RTP of 96.6%
  • Wild and Scatters both act as Pay Symbols and bonus triggers
  • The 1,655x max payout is considered above average for a low-volatility slot

Cons

  • Lacks modern features, like Cascading Reels, Bonus Buy, or Expanding Wilds
  • Classic visual style that reflects the game's 2005 origins

Mermaids Millions vs Thunderstruck II: What's the Difference?

2005's Mermaids Millions and 2010's Thunderstruck II are very similar. Both are products of Microgaming (Games Global), and both feature a 5x3 reel configuration, an above-average RTP, Wilds, Scatters, and bonus games. However, Thunderstruck II is a bit more volatile, and it offers an 8,000x max payout. It also serves up to 243 ways to win instead of 15 fixed paylines.

Mermaids Millions vs Thunderstruck II

FeatureMermaids MillionsThunderstruck II
Release year20052010
VolatilityLowMedium
RTP96.60%96%
Bonus featuresWilds, Scatters, Treasure Bonus, Free Spins, Extra Free Spins, MultiplierWilds, Scatters, 243 Ways to Win, Symbol Swap, Free Spins, Extra Free Spins, Multipliers
Max. win potential1,655x8,000x
Suitable forPlayers who enjoy shorter, low-stress sessionsPlayers who prefer longer sessions and more volatility
Game Details
NameMermaids Millions
ProviderGames Global
RTP96.56%
Paylines15
CategorySlots
Reels5
Volatility
LowLow volatility
Max Win1,655x
Min Bet0.15
Max Bet150
Bonus Feature
Free Spins
Autoplay
Release DateMay 2005

Contents

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Mermaids Millions FAQ

The minimum bet is $0.15, while the maximum bet size is capped at $150, which should suit most budgets.

Absolutely. Mermaids Millions has a Free Spins round with a 3x multiplier and Extra Free Spins.

Yes. Because Mermaids Millions doesn't have too many features and plays much like a classic slot, it's one of the easiest slots to play. Perfect for beginners.

Mermaids Millions offers a maximum payout of 1,655x your bet.

About the Author

Jeffrey Gynn

Jeffrey Gynn

Casino & Sports Betting Specialist

Jeffrey has reviewed and rated hundreds of sports betting sites and online casinos over the past decade-plus. He is regarded as a trusted consumer advocate who aims to ensure that players are treated fairly and get the biggest bang for their gambling bucks. He achieves this goal by producing honest, objective, and detailed reviews, which provide beginners, amateurs, and pros with all the information they need to find the most suitable and trustworthy iGaming sites.

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