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Mermaids Millions slot from Microgaming

Mermaids Millions slot from Microgaming
Mermaids are mythical creatures. They have their special allure, and when asking a hundred people around the world to describe a mermaid, you will most likely get a hundred different tales and rumours. You will collect details portraying them as evil, sweet, ingenious, inarticulate, loyal, promiscuous, aggressive, obedient, uptight, or nonchalant. Is any or all of the above true for you? We advise you to try the Thunderstruck Wild Lightning slot by Microgaming for free.

The blond nymph in Mermaids Millions slot machine surely looks easy-going, but whatever her character traits are, all you want her to be is generous. This 2008 Microgaming release might seem a bit old-fashioned nowadays, but it has all the characteristics of a solid slot anyone could ask for. There are Wilds, a Treasure Bonus, Free Spins where all wins are tripled, and overall good vibes because of the bright colours and the bubbly sound effects. The deep blue action takes place on a 5x3 grid, crossed by 15 pay lines, and is built with an RTP of 95.56%. This Low-Medium Volatility slot has a maximum potential of 1500x the total bet (112 500 CAD via max bet), so it is certainly worth diving into.

Try the Mermaids Millions slot machine now in the instant free version on our page.

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Personal testers’ opinion about Mermaids Millions slot

  • Evidently, to Microgaming fans, the Mermaid game will seem comfortably easy and known, especially if they have ever played Tomb Raider slot (2004), which is the original 'sister' game. Several years after releasing this old Lara Croft action, the developer changed the design and slightly the RTP + the bet range, and the Mermaid adaptation was born.
  • According to us, even though the Mermaids Millions machine is close to unintentionally becoming retro, it still keeps its shine. The bright shades of blue, the bubbly background noises, and the amusing symbols cannot be called extraordinary yet deliver an overall good vibe. The paytable is decent (except the Wilds and Scatters, which are extremely generous - at 500x and 400x the total bet, respectively). According to us, even though the Mermaids Millions slot is close to unintentionally becoming retro, it still keeps its shine. The bright shades of blue, the bubbly background noises, and the amusing symbols cannot be called extraordinary yet deliver an overall good vibe.
  • The paytable is decent (except the Wilds and Scatters, which are extremely generous - delivering 500x and 400x the total bet respectively for 5OAK). The gameplay is not complicated, and the hit frequency is alright at near 34%. You can count on lots of small and insignificant wins in the base game, which makes this slot not really electrifying, yet good for the bonus hunters. The highest potential of the game is realized via the bonus rounds: Free Spins and Treasure bonus. The chance of triggering 1 of the 2 bonuses is high - statistically, once in 45 spins, you will get any. But the rewards from them are not always satisfying.
  • Despite the modest visuals and basic audio, this slot is still popular and cherished. Never mind the low RTP. We believe the game is suitable for bonus money wagering and for sessions with real money. We reckon The Mermaid Millions online slot is fitting for every budget and play style.

Hidden parameters of Mermaids Millions slot (data from testing)

  • The frequency of triggering the bonus is statistically, every 45th spin (2,24%).
  • The probability of a hit (any winning) is 33,88%.
  • The distribution of the winnings is 57% in the usual spins and 43% in the bonus feature.
  • The maximum payout during the tests was 97x.
  • The average winning from the bonus was 22x.
  • Volatility is 5,76 out of 20 (from low to average).
  • Cycle length is from short to average.
  • The rating of the slot machine for the wagering is 5,74 out of 10.
  • RTP of 95.56% does not allow getting a positive mathematical expectation at the casino.


Wild Neptune - is paid generously (500x the total bet for 5OAK) and replaces all other symbols, unlike the Mermaid Scatter and the Treasure Bonus symbol.

Treasure Bonus - Landing 3, 4, or 5 Treasure Chest icons on a pay line will take you on a lucrative trip to the sea bottom, where you get to pick from clams, barrels, and chests and collect cash win. You can be granted 3 to 5 picks and prizes ranging between 2.4 and 166 x the total bet, based on the quantity of Treasure Chest icons, which landed.

  • 3 Treasure bonus symbols: 2.4 - 100x the total bet
  • 4 Treasure bonus symbols: 3.2 - 133x the total bet
  • 5 Treasure bonus symbols: 4.0 - 166x the total bet

Free Spins - 3, 4, or 5 Mermaid Scatters (paid: 400x the total bet for 5OAK) landing at once anywhere on the reels will trigger 10 Free Spins where all your winnings will be tripled. There’s also a chance to trigger the Treasure Chest bonus round and to re-trigger the Free Spins.


  • Provider - Microgaming
  • Payment lines - 15 (fixed)
  • Volatility – Low-Medium
  • The default range of bets - 0.15 to 75 CAD
  • Playing field - 3х5
  • The maximum winning is - 1500x the total bet
  • Bonuses - Wilds, Bonus game, Multiplier x3 (in the Free Spins)
  • Free Spins - Yes, plus possible re-trigger
  • Progressive Jackpot - No
  • RTP - 95.65% (doesn't allow getting a positive mathematical expectation of winning at the casino)

How to win at the Mermaids Millions slot machine? (Conclusion)

  • By all means, before rushing into sessions with real cash, you should practice first in DEMO mode, with this and any other slots.
  • We do recommend this slot to the bonus hunters, as it proves to preserve the balance for a long time with minimum stakes. Especially with such bets, you will enjoy the recurrence of bonuses.
  • We do recommend the Mermaids Millions online slot also to gambling enthusiasts with real credits. Even with the low RTP, the game can actually deliver profits and has its merits for all purposes.
  • It is good for beginners and players who like low-risk laid-back spinning, not perplexing by pretentious/massive potential bonus rounds.
  • Good for players with limited bankroll - to play via small stakes (0.30 to 0.90) and enjoy the game in middle-length sessions. Due to the short to average cycle, they can book positive results.
  • Good for players with big wallets - to play via medium stakes (1.50 to 7.50 CAD). They will have the luxury to change the stakes often and break the game's cycle unexpectedly via this tactic. The high-rollers can experiment with the progressive betting strategy here if they sense that the slot is in a hot mood.
  • However, all the players count the same warning: losing 1/3rd of your initial capital is the indicative moment to break your session, take a pause, or move to another slot.

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Written by Kamen Valev
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