
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% | — | $1.1M |
| $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 1529 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
Amazingly well thought out writing and plot, inventive character design, perfectly challenging puzzles, and so funny! Even better than Tangled Tower and a great addition to the Grimoire lore.
the games get better and better!! this one had such fun characters and i find myself replaying it just to show my friends everything. also quick shoutout to whoever wrote symmetry's dialogue, it's oddly satisfying the way she... speaks?? the poetry? i guess?? idk. when she's all dramatic it's great. also dirk is such a Just Some Guy it's awesome.
Media

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Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
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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
Fun story and awesome art! Puzzles were simple and felt a little repetitive in style but I was here for the story :)
cool
What a game! Definitely the best in the series
解密不算太难,但有始有终。人物设计,美术,配音都是顶级的。场景里什么都可以互动而且有配音,每个角色对每一个物品都有对话,非常推荐
I definitely hyper fixate on every instalment of the Detective Grimoire series. I really hope there are more instalments to come!
Très bon jeu d’enquête, avec une histoire intéressante. Des musiques, une direction artistique et des animations incroyables. Des personnages très originaux, attachants et intrigants, avec un voice acting impeccable. De très bonnes blagues. Une durée de vie d’environ 14 heures si vous prenez le temps d’écouter toutes les interactions et de tout explorer. Bref, si vous aimez les jeux du genre, je vous le conseille grandement !
A wonderful addition to the series! I loved seeing the little hints that lead back to the previous games and gradually uncovering the mystery. I think the writers do a good job of making this one more difficult to guess prior to the reveal. The Puzzles were challenging and some could use a little more telegraphing but overall I think the team improves with each game. I hope to see another one from them in the future!
Uno de esos juegos que recomendaré a cualquier persona sentiente. La música, los personajes carismáticos, las animaciones, el estilo, los misterios que quedan por resolver AAAAAA Que finura
Selling now
See how fast this game is selling right now — estimated copies and revenue per day from recent review growth.
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.
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| $1M | 1K | 87% | $34.99 | |
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