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Neptune’s Harem slot

Neptune’s Harem
Neptune’s Harem
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Updated: 22.07.2025
Reviewed by: Joe Booth

Neptun is a mighty king of the underwater world. But did you know that a large harem of attractive ladies is what supports this strong governor? The Neptune’s Harem slot was developed by Gong Gaming Technologies and powered by Microgaming in the summer of 2021. The machine amazes gamblers with its immersive theme and 4 jackpots, while the review here is designed to explain all these options!

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In this review
  1. Slot details
  2. Theme
  3. Bonus Rounds & Free Spins
  4. Summary
  5. Where to play
General information about Neptune’s Harem slot

General information about Neptune’s Harem slot

Rating by Joe Booth:
9.1
User’s Rating: Not rated yet
Gong Gaming Technologies
Write a review +25 SJ points
  • Release Date:
    26.07.2021
  • Volatility:
    Medium
  • RTP:
    96.9%
  • Multiplier:
    Yes
  • Max. win:
    10,000x
  • Bonus game:
    Yes
  • Free spins:
    Yes
  • Scatter Symbol:
    Yes
  • Wild symbol:
    Yes
  • Symbol Stacked:
    No
  • Jackpot Game:
    Yes
  • Slot lines:
    20
  • Slot reels:
    5
  • Layout:
    5-3
  • Stakes range (€/£/$):
    0.2 to 25
  • Slot Theme:
    Underwater world
  • Technology:
    HTML5
More infoLess info

Licensed and tested by

  • Gambling Comission
  • MGA

How to play

No swimming suit is necessary to dive into this engaging world. Just make sure that you are aware of the basic navigation rules as well as the slot’s main features:

  1. All changes are processed via the menu widget that displays 3 stripes
  2. This way, your bet may be determined as €0.20–€25 per round
  3. The paytable with basic rules explained is also in the menu
  4. The start button is a big round arrow on the right

Options like paylines are fixed, so players don’t change this. The balance, winning, and bet amounts are displayed below.

Neptune’s Harem RTP and Volatility

9 

The RTP of 96.90% is significantly higher than other games are featuring.

Though this factor doesn’t guarantee that you collect huge wins, it’s still a great advantage that the RTP stands at 96.90%, which is a lot. The variance is medium, so even when you are new to gambling, this title won’t be too tough for you.

Theme

10 

If you remember cartoons about Neptune and his riches, then the plot of this slot isn’t new to you. Yet, the detail that makes it stand out is the presence of alluring ladies who are his wives. That’s why the slot is called Neptune’s Harem. The reels are based on the bottom, which makes them surrounded by rocks and different fish species swimming around. And don’t be surprised with these beautiful ladies whispering different spells as they have special powers.

Pleasant design isn’t the only good thing about this slot. Its symbols are also attractive as well as well-paying. There are 20 lines that will count your wins. Shells of different colours are low-paying symbols. The wives of the mighty governor are paying more, especially a red-haired girl. And Neptune himself can provide you with up to 40x. He also serves as a Scatter, while his trident is a Wild that also pays pretty well. Golden gates are bonus symbols that land on reels 1 and 5 to trigger a bonus game.

Theme

Neptune’s Harem slot paytable

Mobile compatibility

Mobile compatibility

If you want to experience this magical adventure on your phone, you are welcome. The limits are absent due to pure HTML5. The browser on your phone or tablet is the only thing you need to get started. It can be a free mode or a real-money stake, whatever suits your budget better. At any rate, your screen will have enough space to display this underwater world and all widgets you need for navigation.

About Gong Gaming Technologies

Though the company was founded in 2020, it has already shown itself as an important market player with serious ambitions. Its works are combining beautiful works of art with smart technologies to make the games outstanding. Dima Farbman is the company’s CEO. Genius Genome is the technology, which is unique and makes the games the vendor delivers distributed to more markets. Like in the case of this game, the company collaborates with strong brands to create projects together. For now, the portfolio includes 16 titles, which include Queen of Treasure, Piggy Luck, and Zuma Riches.

Bonus Rounds & Free Spins

9 

We couldn’t miss information about Neptune’s Harem bonuses as they are both pleasant and interesting to tell about.

Free Spins

Once the golden gates are on reels 1 and 5, this activates a bonus game. Before it starts, there are 2 rounds, during which you pick cards. The women from Neptune’s Harem determine how many spins you can get. There are 5, 7, 8, and 12 spins on offer. And multi-coloured shells determine a multiplier, which may be equal to 2x, 3x, 5x, and 10x. During the feature, any bonus symbol adds an extra 1+ spin.

Neptune’s Harem slot machine

Royal League

Unlike the previous bonus, this one can be triggered randomly during any spin in the base game. The 7x7 field consists of multi-coloured gems and the compass icon on the right contains dice that determines your further steps. Depending on the gem’s colour, your total prize will vary and may stand at 10x, 100, 1,000x, and 10,000x.

Neptune’s Harem Demo play

When you understand that the description of this slot sounds interesting, why not try it out? And if you refuse to do it because of lack of money, don’t worry as there is a totally safe and free way to go. You can play Neptune’s Harem for free on this page and it will be the same engaging title, but now, the losses are absolutely absent.

Max Win

8.5 

Due to the jackpot option, the max win of the slot is attractive.

There are 4 jackpot levels, and each one is pretty rewarding. If we are talking about the maximum winnings, they stand at 10,000x. It’s the highest jackpot level and the slot’s bonuses predispose to this.

Jackpot

As we’ve already mentioned, there are 4 jackpot levels, which are revealed once the Royal League feature is randomly triggered. These jackpots pay 10x, 100, 1,000x, and 10,000x.

Overall Rating

9.1

Neptune’s Harem from Gong Gaming Technologies is a relatively new slot that has a lot of pleasant things for players. Its main advantages are generous bonuses, including free spins and jackpots. Better still, you will be pleased with the basic game as well thanks to the luring theme and sound effects the vendor prepared!

Hits
Jackpots of 4 levels
Free spins with additional multipliers
Magnificent underwater theme
Misses
Only 20 lines to win

FAQ-section

Can I win a jackpot on the Neptune’s Harem slot?

Yes, there are 4 jackpots with wins of 10x, 100, 1,000x, and 10,000x provided during the Royal League feature.

How do I win free spins in this game?

You have to land golden gates on reels 1 and 5. Once it’s done, you pick cards to determine the number of spins and multipliers.

What bets are accepted in this game?

You can place a stake of €0.20–€25 per round.

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Joe Booth
Joe Booth
Expert in: News, Blog, Slot reviews, Payments
Joe is an expert online casino player, who knows all the tricks and tips on how to get to the most massive wins. He is also an experienced online casino games reviewer, with hundreds of written articles behind him, on all kinds of online casino games. He makes sure to play them, see how they work, and then gives his honest expert opinion about them to other players, our readers. 

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Reviewed by Editor-in-Chief
Nikita Lukanenoks

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