Game Information
Review of the gaming machine Mermaid's Diamond from Play'n GO: an underwater treasure with average volatility
Introduction
Mermaid's Diamond — this is an engaging video slot from the famous developer Play'n GO, released on September 20, 2017. The game immerses players in a magical underwater world, where mermaids guard precious treasures. The slot is executed in the fantasy genre with an emphasis on the beauty and mystery of marine depths.
Key features of the slot
- 720 ways to win (Both Ways).
- Average volatility.
- RTP up to 96.5%.
- Maximum win — up to x5000 of the bet.
- Unique bonuses: Trident Wilds and Divine Intervention.
Design and atmosphere
Mermaid's Diamond impresses with its aesthetics: rich turquoise tones, shimmering precious stones, and a unique mermaid create an atmosphere of a mysterious underwater kingdom. The animations are smooth, the sound accompaniment is calm and melodic, enhancing the feeling of immersion. The interface is intuitively understandable even for beginners.
Characteristics and symbols
Technical parameters
| Parameter | Meaning |
|---|---|
| Developer | Play'n GO |
| Release date | September 20, 2017. |
| Barabany / Linii | 5 barabans / 720 ways to win |
| Rate range | from €0.20 to €100 per spin |
| Max. Wins | x5000 bets |
| RTP | 96.5% (in some casinos it may be 94.45%) |
| Volatility | Average |
Payouts for combinations (5 symbols)
- Almaz — x10 bets.
- Mermaid (Wild) — x5 bets.
- Osminog — x4 bets.
- Kit — x3 bets.
- Medusa — x2 bets.
The Russian doll replaces all symbols except Scatter.
Bonus functions and unique mechanics
- Trident Wilds: at any moment, the base game may randomly activate the addition of one or two Wild symbols on the reels with a non-paying respin.
- Divine Intervention: if 4 Scatters (a box with symbols) appear on the screen without a win, this function activates — a fifth Scatter is added, launching free spins.
- Free Spins: to activate, you need to collect 5 Scatters. The player chooses one of the boxes, which reveals between 10 and 25 free spins. During the free spins, diamonds turn into special symbols that can trigger additional Trident Wilds.
- Absence of risk-gaming: a classic game for doubling is not provided.
Expert opinions and recommendations
Mermaid’s Diamond — an excellent choice for those who value the balance between frequency and size of wins. Thanks to the medium volatility, the slot is suitable for cautious players as well as for those willing to take risks for a big win.
Recommendations
- Use demo mode to study the frequency of bonus activations.
- Optimal strategy — make medium bets (€1–€5) to prolong the gaming session and hope for free spins.
- Don't forget about Divine Intervention — it can 'save' a losing streak.
Mathematical model
- RTP: 96.5% (in most licensed casinos) — above the average market indicator.
- Volatility: average — winnings come regularly, but large payouts require bonus rounds.
- Chances of winning:
- Base game: moderate frequency of small and medium wins.
- Free spins: high potential thanks to multiple Wilds.
- Maximum win (x5000) can only be achieved with an ideal combination in free spins.
Compared to analogs
- Mermaid’s Millions (Games Global) — a classic slot with a similar theme, but with a lower RTP (95.11%) and simple bonuses.
- Golden Caravan (Play’n GO) — also uses 720 ways to win, but has a different theme and higher volatility.
- Moon Princess (Play’n GO) — a popular slot with cascading wins and high volatility, oriented towards big payouts.
Mobile version

Mermaid’s Diamond is fully adapted for mobile devices. The game works correctly on iOS and Android, maintaining graphics quality and touch speed. It launches directly in the browser — without the need to download an application.
Pros and cons
Pros
- High RTP (96.5%).
- Unique bonus features (Divine Intervention, Trident Wilds).
- 720 ways to win in both directions.
- Excellent mobile optimization.
- Attractive visual style.
Cons
- No possibility of retriggering freespins.
- Maximum win lower than that of top Play’n GO slots (for example, Book of Dead — x5000+, but with different conditions).
- In some casinos, RTP may be reduced to 94.45%.
Locking
Mermaid’s Diamond — a reliable and beautiful slot with thoughtful mechanics and a pleasant atmosphere. It does not break records for volatility or maximum win, but offers stable gameplay and interesting bonuses. It will especially appeal to fans of underwater themes and players who prefer moderate risk.
Overall rating: 8.5/10
Frequently Asked Questions (FAQ)
Is there a demo version of Mermaid’s Diamond?
- Yes, most licensed online casinos and developer sites offer a non-paying demo game.
Can you play for real money?
- Access depends on the jurisdiction of the casino. It is recommended to check the operator's license and regional restrictions.
How often do freespins drop?
- Free Spins are rarely activated — 5 Scatters are required. However, the Divine Intervention feature increases the chances when 4 Scatters appear.
Does the game support automatic mode?
- Yes, autospins are mostly available with the possibility of setting limits.
