
An impossible locked-room murder: Captain Mortuga lies dead beside an ancient cauldron aboard the world’s strangest submarine, crewed by sketchy suspects. A handcrafted point-and-click with sharp humour and tricky puzzles. Dive into the next mystery from the creators of Tangle Tower & Crow Country.
Modeled estimate, not a reported figure. How we estimate →
Prices
The United States storefront in every case, so this compares stores and not countries.
Prices
Each in the currency that store quoted — not converted: the gap between two rows is the publisher's pricing, not an exchange rate.
Every market we collect.
About
In the pitch-black waters beyond a long-abandoned fishing town, the enigmatic captain of the world's strangest submarine has been murdered. Some say he was an immortal time-traveller. Others say he was a vampire, cursed to stay hidden beneath the waves forever...
Found alone in a locked room, with only an ancient stone cauldron to suggest how he might have died, it's up to Detective Grimoire and Sally to piece together what really happened. Was it a curse, released from the cauldron? One of the submarine's eccentric crew? Or does the bizarre truth run even deeper...
• Every clue is a fully realised 3D object waiting to be examined for hidden secrets
• Grimoire and Sally are back, and joined by a fully voiced cast of mysterious suspects
• A hauntingly beautiful original soundtrack performed by the Budapest Art Orchestra
• Explore every hand-painted inch of The Mortuga Submarine, where not all is as it seems...
*Voice audio is only in English
Genres
Sums Steam only; PlayStation publishes no volume signal, so the true total is higher by an unknown amount.
| Store | Price | Audience | Score | Chart | Est. revenue |
|---|---|---|---|---|---|
SteamYou are here | $19.99 | 2.9Kreviews | 99% | — | $1M |
| $19.99 | 69ratings | 96% | — | not modelled |
Matched by title — a reused name can pair the wrong games. * is a critic aggregate. Prices and positions are each store's United States storefront; Epic charts worldwide. Audience and Score too, except Steam's, which is worldwide.
Engagement
Reviews
Themes across 1498 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
NB B NG 캐릭터들의 특징들이 다 좋았어요
The presentation for the mystery and untangling the suspicions is so much more ambitious and I think it largely pays off. Stellar voice cast once again. Some minor qualms about the mystery setup but those barely matter. Introducing 3D for some puzzles helps with variety and the space within which you have to think. All in all, a very fun game with a great cast of characters to spend time with and pick apart the lies to get at the truth.
Media

Related
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Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
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Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| $1M | 992 | 87% | $34.99 | |
| $1M | 493 | 83% | $49.99 | |
| $1M | 1.3K | 40% | $19.99 | |
| $1M | 1.5K | 73% | $19.99 | |
| $1M | 3.1K | 92% | $13.99 | |
| $1M | 1.5K | 81% | $19.99 |
Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| $1.8M | 6.8K | 95% | $19.99 | |
| $607.9K | 1.8K | 92% | $14.44 | |
| $83K | 291 | 87% | $15.99 | |
| $37.1K | 256 | 89% | $9.99 | |
| $13.2K | 109 | 95% | $8.99 | |
| $3.7K | 15 | 67% | $14.99 |
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English*, French, Italian, German, Spanish - Spain, Japanese, Korean, Portuguese - Brazil, Russian, Simplified Chinese, Spanish - Latin America, Traditional Chinese*languages with full audio support
Hours played at review time, across 1.5K reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
Uma ótima continuação pra o universo de Detective Grimoire. Personagens carismáticos e história cativante, com todos os diálogos dublados e todos os personagens animados, se você for fã de jogos de investigação bem feitos, esse é um jogo que você deve jogar.
Fantastic game, had a great time with the artwork and the story and reading through the art gallery. The ways The Mermaid Mask related back to Tangle Tower was fascinating and made me want to replay the game. Excited for the next one! There's still some hidden lore about part of the story that I wish would be unveiled in the future.
Mais um jogo maravilhoso do detetive Grimoire e da Sally! Mermaid Mask tem um enredo bem intrigante, personagens carismáticos pra questionar, uma arte muito bonita com animações divertidas, vozes muito boas e tem também uma tradução pt-br oficial muito boa! Revomendadissimo! Pra quem gosta de achievements, cuidado: tem três que são fáceis de perder.
Un juego redondo que he disfrutado muchísimo. Es brillante en todos sus apartados, como la entrega anterior, pero se han superado con ese final. Esperaré el tiempo que haga falta para el siguiente 🧘♂️
This third installment of this great series is amazing. The riddles were great, the dialog so interesting and the story very intriguing. But the best was of course the characters.
Honestly I knew I was up for a great game, and it did not disappoint. I LOVE THIS GAME SERIES SM!! the characters, the art, the story, the hole vibe was just 10/10. I genuinely admire how they came up with a game deserving to be a predecessor for Tangle Tower with the same quality level. Would totally recommend.
Guys please play this game its so peak!! The voice acting and animations are so talented!!! Plus the dialogue is so funny. 10/10 everyone hop on NOW!!
A great follow-up to Tangle Tower as the newest installment in the detective Grimoire series. Great atmosphere, decent puzzles and a mystery that's both gripping and enough twists to keep you wondering until the end.
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Active players
Estimated daily and monthly active players (DAU/MAU) modeled from peak concurrency.
Players by region
Where this game's players are, estimated from review languages.
Players also reviewed
The games this title's players most often review too — audience affinity.