Free demo, RTP, volatility and bonus features of the Mermaid's Diamond slot by Play'n GO.
Dive into an underwater world in Mermaid's Diamond. This 720-way slot features a unique hexagon grid, where diamonds and mystical sea creatures can lead to sparkling treasures beneath the waves.
Mermaid's Diamond is an online slot from Play'n GO. Play'n GO develops a broad portfolio of online casino games, including celebrated slots, table games and bingo titles, with mobile-first demos and distinctive recurring series.
You can open Mermaid's Diamond here as a no-registration browser demo and study the buttons, the paytable and the feature triggers at your own pace. The free round is useful for judging speed and readability before betting anything.
5%, medium volatility and a stated maximum win of 5000x. The recorded release date is September 19, 2017. RTP is a long-term theoretical figure and says nothing about a single session. Volatility points to how evenly or unevenly wins arrive, and the maximum win is a cap rather than a target.
Gameplay tags associated with Mermaid's Diamond include Free Spins, Wilds, Scatters, Ways. The list gives a fast overview of what drives the wins here. The detailed behaviour is described in the rules section, and the in-game help screens of Mermaid's Diamond carry the definitive payout table.
Run Mermaid's Diamond at a couple of different stake levels, watch how the ordinary wins form and note what changes when a special symbol lands. Opening the information panel before the first spin, and again after changing a setting, keeps the paytable and options in view.
Over a longer sample the balance movement shows how much of the return comes from the base game rather than the features.
Settings can differ between casinos, licences and software builds. So confirm the live RTP, the bet limits and the feature availability in the version you actually play. Demo results never predict real-money outcomes. Decide on a budget in advance, never chase a loss, and keep casino games in the entertainment column.
Mermaid's Diamond is a 5-reel slot with 720 ways to win in a 3-4-5-4-3 diamond shape. Trident Wilds can be randomly added to the reels on any spin. Land 5 Chest scatters to trigger Free Spins. If you land 4, the Divine Intervention feature may trigger to add the 5th.
During Free Spins, collect diamonds to trigger Trident Wilds. Every 5 diamonds collected adds at least one Wild column. The feature can be retriggered by landing more scatters, with no set limit on the number of spins.
How to play the Mermaid's Diamond demo: open the game, wait for the interface to finish loading and review the paytable or help menu before starting. Choose a comfortable virtual stake with the on-screen controls, then begin a round and let the result complete before changing settings. The demo uses play credits.
But the controls and feature sequence are designed to mirror the corresponding game experience.
For this slot format, set the virtual stake and press spin. Winning combinations are evaluated according to the paytable after the reels or grid settle. Check whether the game uses paylines, ways, clusters or another win system. That is because this determines how matching symbols connect. Wilds, scatters and bonus symbols may follow separate rules.
The mechanics recorded for this title are Free Spins, Wilds, Scatters, Ways. Feature labels summarise the catalogue entry. But the game screen determines the exact trigger, duration and payout calculation.
5% RTP, medium volatility and a maximum win of 5000x. RTP is calculated across a very large number of rounds and cannot forecast a short demo session. Volatility describes the intended risk pattern: higher settings generally mean outcomes may be less frequent and more uneven.
A maximum win is a ceiling and should never be treated as a likely target.
During testing, watch the stake shown before every round, the balance change after settlement, the symbols or events that trigger features and any multiplier that remains active. Try the base game first instead of immediately selecting an optional shortcut.
If autoplay is available, set a limited number of rounds and stop conditions so the session remains easy to follow.
Availability, RTP and feature settings may differ between operators or countries. Always use the paytable and help menu in the exact version being played. Real-money gambling involves financial risk. Use fixed limits, take breaks and never increase a stake to recover a loss.
Last checked: 2026-09-11
Free demo mode: this game runs with play money only — no real-money wagering and no winnings.
18+ only. Gambling involves risk — play responsibly, set deposit and time limits, and never play with money you cannot afford to lose.
Built by Play'n GO, Mermaid's Diamond is an online slot, released in 2017. It is built around free_spins, wilds, scatters and ways. The demo above loads the complete game with play money, which lets you learn the paytable before risking a real balance.
Play'n GO lists a return to player (RTP) of 96.5%, medium volatility and a maximum win of 5000x for Mermaid's Diamond. In practice that means hit frequency and payout size stay in balance. That suits most session lengths. RTP is a long-run average across millions of spins, not a promise for a single session.
Trying Mermaid's Diamond in demo mode costs nothing and shows exactly how often the features fire. If you later play for real money, pick the operator by licence, payout speed and bonus terms rather than by the biggest headline offer.
Dive into an underwater world in Mermaid's Diamond. This 720-way slot features a unique hexagon grid, where diamonds and mystical sea creatures can lead to sparkling treasures beneath the waves.
Mermaid's Diamond is an online slot from Play'n GO. Play'n GO develops a broad portfolio of online casino games, including celebrated slots, table games and bingo titles, with mobile-first demos and distinctive recurring series.
You can open Mermaid's Diamond here as a no-registration browser demo and study the buttons, the paytable and the feature triggers at your own pace. The free round is useful for judging speed and readability before betting anything.
5%, medium volatility and a stated maximum win of 5000x. The recorded release date is September 19, 2017. RTP is a long-term theoretical figure and says nothing about a single session. Volatility points to how evenly or unevenly wins arrive, and the maximum win is a cap rather than a target.
Gameplay tags associated with Mermaid's Diamond include Free Spins, Wilds, Scatters, Ways. The list gives a fast overview of what drives the wins here. The detailed behaviour is described in the rules section, and the in-game help screens of Mermaid's Diamond carry the definitive payout table.
Run Mermaid's Diamond at a couple of different stake levels, watch how the ordinary wins form and note what changes when a special symbol lands. Opening the information panel before the first spin, and again after changing a setting, keeps the paytable and options in view.
Over a longer sample the balance movement shows how much of the return comes from the base game rather than the features.
Settings can differ between casinos, licences and software builds. So confirm the live RTP, the bet limits and the feature availability in the version you actually play. Demo results never predict real-money outcomes. Decide on a budget in advance, never chase a loss, and keep casino games in the entertainment column.
Mermaid's Diamond is a 5-reel slot with 720 ways to win in a 3-4-5-4-3 diamond shape. Trident Wilds can be randomly added to the reels on any spin. Land 5 Chest scatters to trigger Free Spins. If you land 4, the Divine Intervention feature may trigger to add the 5th.
During Free Spins, collect diamonds to trigger Trident Wilds. Every 5 diamonds collected adds at least one Wild column. The feature can be retriggered by landing more scatters, with no set limit on the number of spins.
How to play the Mermaid's Diamond demo: open the game, wait for the interface to finish loading and review the paytable or help menu before starting. Choose a comfortable virtual stake with the on-screen controls, then begin a round and let the result complete before changing settings. The demo uses play credits.
But the controls and feature sequence are designed to mirror the corresponding game experience.
For this slot format, set the virtual stake and press spin. Winning combinations are evaluated according to the paytable after the reels or grid settle. Check whether the game uses paylines, ways, clusters or another win system. That is because this determines how matching symbols connect. Wilds, scatters and bonus symbols may follow separate rules.
The mechanics recorded for this title are Free Spins, Wilds, Scatters, Ways. Feature labels summarise the catalogue entry. But the game screen determines the exact trigger, duration and payout calculation.
5% RTP, medium volatility and a maximum win of 5000x. RTP is calculated across a very large number of rounds and cannot forecast a short demo session. Volatility describes the intended risk pattern: higher settings generally mean outcomes may be less frequent and more uneven.
A maximum win is a ceiling and should never be treated as a likely target.
During testing, watch the stake shown before every round, the balance change after settlement, the symbols or events that trigger features and any multiplier that remains active. Try the base game first instead of immediately selecting an optional shortcut.
If autoplay is available, set a limited number of rounds and stop conditions so the session remains easy to follow.
Availability, RTP and feature settings may differ between operators or countries. Always use the paytable and help menu in the exact version being played. Real-money gambling involves financial risk. Use fixed limits, take breaks and never increase a stake to recover a loss.
Yes. The demo on this page runs Mermaid's Diamond with play money — no deposit, no account and no download. Demo balances have no cash value and cannot be withdrawn.
Mermaid's Diamond was developed by Play'n GO. You can browse the studio's other titles from the provider page linked at the top of this page.
Play'n GO publishes an RTP of 96.5% for Mermaid's Diamond. That figure is a theoretical long-run average; individual sessions can land far above or below it. Some operators run configurable RTP versions, so check the game info screen in the casino you play at.
Mermaid's Diamond is rated medium volatility, which means hit frequency and payout size stay in balance. That suits most session lengths.
The win cap for Mermaid's Diamond is 5000x. Reaching it usually requires the top feature combination, so treat it as a ceiling rather than an expected result.
Mermaid's Diamond uses free_spins, wilds, scatters and ways. The demo above is the quickest way to see how often each feature triggers.
Yes. Mermaid's Diamond runs in the mobile browser on iOS and Android — the demo on this page adapts to portrait screens, and no app install is needed.
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