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Slot Review
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Times Played:
1 Times Played
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Quick Facts
| Provider: ProviderThe Slot Provider is none other than the company who developed the slot. Simply click on the name of the provider to find our more about it! | |
| Date Launched: Date LaunchedThe date when this slot game was launched. | 20/09/2017 |
| Theme: ThemeTheme is the general genre that the the slot could be classified as. One of the elements that makes slot games appealing, A nicely planned popular theme can potentially skyrocket the popularity of an online slot! | Crystals, Diamonds, Fantasy, Gems, Jewelry, Mermaid, Treasure, Waterworld |
| Jackpot: JackpotA stand-alone or multi-leveled progressive prize pool that a player can win at a given time, simply by spinning the reels. | |
| Special Symbols: Special SymbolsThe special symbols of a slot are part of its mechanic. Elements such as Wilds, Scatters and regular paying symbols come together to form winning combinations. | Scatters, Wilds |
Review Summary
Mermaid’s Diamond by Play’n Go throws you right into an underwater treasure hunt where the mermaid isn’t just a pretty face—she’s the wild symbol helping you line up wins across 720 ways. Expect stretched-out tails, divine trident strikes, and diamonds that lead to more than bragging rights. It’s packed, it’s shiny, it pays both ways—so you’d better keep your eyes on the reels and your head out of the clouds.
Slot Information
| Return to Player (RTP): Return to Player (RTP)The Return to Player is a statistic that aims to show the player's edge over the casino - the higher this number is the better! We review all slots based on this RTP value so click on the percentage on the right to find our more slots with a similar RTP! | 94.45% |
| Volatility/Variance: Volatility/VarianceVolatility or Variance is meant to describe the winning potential of a slot game: a high volatility will have you win big but no so often, while a low volatility will let you win frequently, but less. | Medium |
| Progressive Slot: Progressive SlotA progressive slot is a slot that keep on growing its total possible winning pool; usually linked by a network of slots. It is also known as a jackpot. | |
| Slot Type: Slot TypeSlots can be categorized as classic, 3D, video slots, etc. Click on the type of slot on the right to see similar types of slots! | Video Slot |
| Rows: RowsPart of the design of the slot, the rows are the horizontal lines that trigger special features when certain paying symbols fall in place. | 5 |
| Reels: ReelsReels are the vertical lines that are build in the slots architecture; together with the rows they help trigger special winning combinations. | 5 |
| Paylines: PaylinesPaylines, or betting lines, are the pre-determined links of symbols across the rows and reels of a slot. A slot can have anywhere from just 1 payline or up to thousands paylines! | 720 |
| Slot Layout: Slot LayoutThe layout of the slot is the way the slot is built, based on the number of rows, reels and paylines. | 3 x 4 x 5 x 4 x 3 |
Slot Features
Pros
- 720 bothway paylines.
- Unique reel layout (3-4-5-4-3).
- Expanding Wilds and random Wild features.
- Free Spins with progressive Diamond feature.
- Available in demo mode at CasinoLandia.
Cons
- Medium variance may not appeal to high volatility fans.
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Screenshots
Mermaid’s Diamond Slot Home Screen
Mermaid’s Diamond Slot Paytable
Mermaid’s Diamond Slot Paylines
Mermaid’s Diamond Slot Base Gameplay
Mermaid’s Diamond Slot Winning Combination
Mermaid’s Diamond Slot Free Spins Round Total Win
Mermaid’s Diamond Slot Free Spins Round Gameplay
Expert’s Opinion
I’ve played Mermaid’s Diamond enough to say it holds up well even years after release. It’s not groundbreaking, but it’s extremely well-built and still worth playing today. The layout is different enough to feel fresh, and the bonus round progression with Diamond collection actually gives you something to chase. I don’t love the RTP being under 95%, but in practice, the Wild features and bothway mechanics do their job. If you’re into moderate volatility slots with high feature density and clean execution, this one’s absolutely worth your time.
8.86 /10 by Gabriela Kirilova
Play Mermaid’s Diamond for Real Money
Introduction to Mermaid's Diamond
Play’n Go’s Mermaid’s Diamond dives deep into a whimsical underwater world full of shimmering gems, swirling currents, and divine interventions from Poseidon himself. Released back in September 2017, this title still holds up remarkably well in terms of visuals, mechanics, and bonus variety. It’s not another lazy underwater clone with boring seashells and dolphins. Instead, the game builds its own atmosphere, balancing mystique and fantasy with solid slot mechanics. The unique 3-4-5-4-3 reel layout immediately sets it apart, offering a rare 720 bothway paylines system that rewards matches from either direction. Everything about this slot—from the animated mermaid wilds to the magical treasure chest triggers—feels carefully designed to maintain tension and reward attentive players. There’s a strong balance between casual spinning and deeper engagement once you unlock its bonus layers, especially during the Free Spins round where diamonds and Trident Wilds dominate the grid.
Mermaid's Diamond Slot Provider
Play’n Go has long been one of the most reliable names in online slots, and Mermaid’s Diamond is a great example of how they balance creative theming with rock-solid mechanics. Known for constantly experimenting with formats and bonus systems, Play’n Go doesn’t stick to one formula. In this case, they’ve embraced asymmetry with the reel layout and delivered a medium variance game that still packs enough heat to keep seasoned players spinning. The artwork is crisp, the animations are fluid, and every feature operates without lag or clunkiness. Since its release, Mermaid’s Diamond has remained part of many casino libraries for a reason—it blends mass appeal with serious player rewards, and it’s clear that Play’n Go wasn’t cutting corners here. The soundtrack, pacing, and feature integration are all dialed in with that classic Play’n Go polish, making this one of the better aquatic-themed slots out there.
Mermaid's Diamond Slot Characteristics:
| Characteristic | Value |
|---|---|
| Paylines | 720 |
| RTP | 94.2% |
| Max Win | x5,000 |
| Bonus Game | No |
| Special Symbols | Scatters, Wilds |
| Paid Symbols | 9 |
| Free Spins | Yes |
| Reels | 5 |
| Rows | 3 |
| Slot Layout | 3x4x5x4x3 |
| Technology | HTML5, JS |
| Platforms | Mobile, Desktop, Tablet |
| Minimum Bet | $0.1 |
| Maximum Bet | $100 |
Mermaid's Diamond Slot Gameplay and Mechanics
The base game of Mermaid’s Diamond runs on a 3-4-5-4-3 reel structure, resulting in 720 fixed paylines that pay both left-to-right and right-to-left. This means you’re essentially doubling your shot at lining up wins with every spin, and the action never feels stale. The game’s core mechanic revolves around matching adjacent symbols, regardless of the direction, which gives a broader win potential compared to standard left-to-right-only slots. At the heart of this game is the Wild Mermaid, who becomes a full-reel Wild whenever two or more appear on the same reel. Random Wilds triggered by Poseidon’s Trident also keep the pace lively, injecting unexpected wins during base spins. The treasure chest Scatter is the key to unlocking Free Spins, and you’ll find that the chest mechanic isn’t just about collecting five—it has a twist. Even four can be enough, thanks to Poseidon potentially adding a fifth through his divine touch. Here’s a breakdown of the main base game features:
- Bothway Payouts: Symbols match left to right and right to left.
- 3-4-5-4-3 Reel Grid: Unconventional but intuitive once you start spinning.
- Wild Symbol: The mermaid covers the entire reel when she appears twice or more on one reel.
- Poseidon’s Random Wilds: Triggered randomly, adds extra Wilds to the grid.
- Treasure Chests: Appear during base spins and unlock Free Spins at five collected.
Mermaid's Diamond Slot RTP
Mermaid’s Diamond operates on an RTP of 94.45%, which is lower than the industry standard but still reasonable for a medium-volatility slot with layered features and bothway paylines. The game does feature an RTP range, meaning some casinos may offer it with a different percentage, so players should always check the version they’re playing. The RTP feels balanced against the generous frequency of Wilds and the unique Free Spins progression. It’s not a high-roller’s dream in terms of sheer numbers, but it’s built for consistency and momentum rather than volatility spikes. The presence of RTP ranges also tells us one thing: casinos have flexibility, and players should be cautious about where they play to avoid the lowest setting. That said, the base game delivers enough value, especially when Poseidon intervenes to improve outcomes mid-spin.
Mermaid's Diamond Slot Volatility
The medium volatility in Mermaid’s Diamond is exactly what keeps it engaging without being frustrating. It strikes that elusive sweet spot—frequent enough wins in the base game to keep you engaged, with the occasional heavy payout when Free Spins line up perfectly. It’s not going to deliver massive dead streaks or sudden high-risk paydays, which makes it appealing to both risk-averse and moderately aggressive players. The inclusion of expanding Wilds, random Wild triggers, and 720 paylines ensures that even spins without big payouts often come close, maintaining a sense of progress. You won’t feel like you're endlessly burning through your bankroll here, but don’t expect massive volatility spikes either. It’s a methodical build-up rather than an all-or-nothing slot.
Mermaid's Diamond Slot Betting Range
The betting range in Mermaid’s Diamond is inclusive and scalable, starting at €0.20 and maxing out at €100 per spin. This setup caters to cautious players and budget spinners while also giving enough room for those who like to increase the stakes without immediately entering high roller territory. The fixed 720 paylines mean you don’t need to tweak line bets, just choose your overall stake. For players who like to test features on lower budgets or gradually scale their sessions upward, the range offers more than enough flexibility. The simple betting system avoids clutter and confusion—just set your bet and spin. Combined with the medium volatility and bothway payouts, the betting structure supports a smooth rhythm across both short and long sessions.
Mermaid's Diamond Slot Symbols Explained
The symbols in Mermaid’s Diamond are a visual feast that mirrors the game’s oceanic theme but also function with mechanical clarity. The low-paying symbols are made up of starfish, shells, and sea-themed jewelry, each represented in intricate gem-like forms. These are not standard card symbols—they’re all custom icons, which is a nice touch for immersion. The higher-value symbols include colored gemstones—rubies, emeralds, sapphires, and diamonds, each designed to feel valuable and thematic. The Mermaid Wild is easily the standout symbol, both in terms of design and function. When she appears more than once on a reel, she expands to cover the entire reel, boosting win potential significantly. The Treasure Chest Scatter symbol is the Free Spins trigger, and you’ll be chasing these throughout the base game. Finally, Diamond Symbols during Free Spins play a special role, unlocking additional Wild features once you’ve collected enough. This multi-layered use of symbols helps the slot feel more complex than just lining up pretty pictures.
Mermaid's Diamond Symbols
Let's explore each symbol and its' payout range:
x5 = 100
x4 = 20
x3 = 10
x5 = 25
x4 = 12,50
x3 = 5
x5 = 15
x4 = 7,50
x3 = 3
x5 = 10
x4 = 5
x3 = 2
x5 = 7,50
x4 = 4
x3 = 1,50
x5 = 7,50
x4 = 4
x3 = 1,50
x5 = 5
x4 = 2,50
x3 = 1
x5 = 5
x4 = 2,50
x3 = 1
Mermaid's Diamond Slot Free Spins Round
The Free Spins feature in Mermaid’s Diamond is where things really heat up. Triggered by landing five Treasure Chest Scatter symbols, the game will allow you to choose from one of the chests to reveal your initial Free Spins amount, up to 25. What sets this bonus round apart is its layered progression system. Even if you only land four chests, Poseidon may step in and drop the fifth symbol needed to trigger the feature, adding an unpredictable edge. During Free Spins, Diamond symbols become crucial—collecting five of them triggers the Trident Wilds, which are randomly added by Poseidon. Not only does this increase your chance of big wins, but it also adds momentum to the bonus round. You can re-trigger Free Spins by landing three or more chests during the round, adding at least three more spins. Key details:
- Trigger: 5 Treasure Chests (or 4 plus Poseidon’s intervention)
- Random Chest Reveal: Up to 25 Free Spins
- Collect 5 Diamonds: Unlocks Trident Wilds
- Re-trigger: 3+ chests = 3+ additional spins
- Wild Density: Significantly increased with Trident Wilds
Mermaid's Diamond Slot Features
The slot is packed with features that activate both randomly and through symbol combinations. The core features include:
- Bothway Paylines (720 Ways): Wins count left to right and right to left.
- Expanding Mermaid Wilds: Two or more on a reel trigger full reel Wilds.
- Random Trident Wilds: Poseidon can throw down Wilds at any time.
- Treasure Chest Free Spins: Up to 25 spins awarded randomly via chest pick.
- Diamond Collection: Build toward Trident Wilds by collecting five diamonds during Free Spins.
- Re-triggers Available: You’re not locked into one bonus—spin into more.
The game keeps things unpredictable, making each session feel fresh. The combination of visible build-up mechanics (like Diamond collection) and sudden random events (Poseidon's interventions) balances long-term engagement with short-term excitement.
Mermaid's Diamond Demo Version
We at CasinoLandia offer a completely free demo version of Mermaid’s Diamond, no registration or deposit required. This is your chance to test the unusual 3-4-5-4-3 layout, get a feel for the random Wilds, and experiment with different betting levels before committing real money. You’ll be able to experience everything—Wilds, Free Spins, Diamond collections—exactly as they appear in the real-money version. It’s an ideal way to see if the slot fits your playstyle without taking a financial risk.
Mermaid's Diamond Slot Compatible Devices
Play’n Go has optimized Mermaid’s Diamond for flawless performance across all devices, including desktops, tablets, and smartphones. The game runs smoothly in both portrait and landscape modes, with no loss of animation quality or control precision. All interface elements are responsive and scale appropriately depending on screen size. The touch controls are intuitive, and the vertical reel layout actually makes this slot look fantastic on mobile. Whether you’re spinning on a large monitor or a compact screen, everything from sound to visuals stays sharp.
Frequently Asked Questions (FAQs)
These questions provide concise answers to common queries about Mermaid's Diamond Slot, ensuring clarity and understanding for players.
What is the RTP of Mermaid's Diamond?
96.55% – This is above average and gives players a relatively fair return over time.
What is the maximum win in Mermaid's Diamond?
2,500x your bet – You’ll need a strong bonus round combo to hit the cap.
How many paylines does Mermaid's Diamond have?
40 fixed paylines – You can’t adjust them, and all are active on every spin.
Does Mermaid's Diamond Slot Offer a Free Spins Round?
Yes – It’s part of the Wild North Bonus Game, triggered by the Aurora Scatter. It includes seven different bonus features, some with free spins.
Can I play Mermaid's Diamond on my mobile device?
Yes – Fully optimized for mobile play on Android and iOS with no drop in quality.
Is there a demo version available for Mermaid's Diamond?
Yes – You can try it for free at CasinoLandia or any casino that hosts Play’n Go titles.
What are the betting limits in Mermaid's Diamond?
From €0.20 to €100 per spin – It suits both casual players and those with higher budgets.
What features does Mermaid's Diamond offer?
Wilds, Scatters, Seven Bonus Rounds – Including expanding symbols, mega symbols, multipliers, and more. Each animal-themed feature plays differently.
Where can I play Mermaid's Diamond?
At any legit casino offering Play’n Go slots – Check CasinoLandia’s list of licensed platforms to avoid shady operators.
What is the volatility level of Mermaid's Diamond?
Medium volatility – A decent mix of frequent low wins and occasional big payouts.
What symbols should I look out for in Mermaid's Diamond?
The Owl, Lynx, and Wolf – They pay the highest. Also, the Aurora Borealis Scatter is key to triggering the bonus game.
Concluding Thoughts
Mermaid’s Diamond is more than just another ocean-themed slot with a pretty backdrop. It brings a layered structure with bothway wins, frequent Wilds, and a Free Spins feature that actually evolves as you play. The unique layout helps the game stand out, and the medium volatility keeps it playable for most bankrolls. It may not break new ground in terms of innovation, but the features it does offer are well-executed and work together to create a cohesive, rewarding slot.
