Fancy some retro slot gaming at its best? Then you’ve made a splash in the right place as Microgaming’s Mermaids Millions is one of the original must-play slots. With five reels and 15 paylines, this slot is similar to Agent Jane Blonde in that it has an intriguing main female character, fun bonuses and is part of Microgaming’s classics portfolio.


Pros & Cons

  • Classic slot.
  • Fun bonuses.
  • 7,500 coin jackpot.
  • Showing its age.
  • Can be tough to trigger bonuses.
  • Busy screen.

How to Play

Despite this slot taking you to the depths of the ocean, there’s still a very mechanical type look and feel to it. This is unlike other underwater-themed slots, which often feature more of the ocean. At the bottom of the screen you’ll see all the betting options and the spin button, appearing in a bar. Above that, you’ll see the reelcase and symbols dotted around. It might not look as glamorous as more recent slots like Siren’s Kingdom, but the bright visuals that launched Microgaming to fame feature in abundance. Hit the spin button, in a nice blue square on the farthest right, and start matching those winning symbols.


The royal cards appear underwater to make up the low value symbols. But each of them has a nice aquatic touch, such as a crab peering over the Ace symbol, pearls on the Queen and a starfish on the Ten. Keeping in line with the underwater theme, the high value symbols are made up of a Seahorse, Clam with a pearl inside and a Box filled with gems. The Treasure Chest is the Bonus and says as much, while the Mermaid is the Scatter and King Neptune is the Wild. When he appears on the reels he can substitute for all other symbols except the Scatter to help create more winning combinations.


Mermaids Millions has two fun, and rewarding, bonus features to enjoy. They are the reason the slot’s still so popular to this day!

Bonus Name Bonus Explanation
Free Spins

You trigger the Free Spins feature when the Mermaid Scatter symbol appears three, four or five times across the reels. You’ll get ten Free Spins and all your wins throughout this bonus will be multiplied by three! If you get three or more Scatters during your Free Spins you net another bunch of Free Spins to use! During your Free Spins you can also trigger the Treasure Bonus.

Treasure Bonus

You’ll trigger this round when you hook three, four or five of the Treasure Bonus symbols on an active payline. The reelcase will move away and you’ll be presented with an underwater cave. Inside this, you’ll see a range of items to pick. Simply make your choice and revel in the cash prize that’s revealed. You can choose up to three.

Mermaids Millions Slot Details

Developer Paylines Reels Min Bet Max Bet Min Coins Max Coins RTP(%) Jackpot Released
15 5 0.01 1 1 10 95.56% 37,500 2008