
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 →
Media

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
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
Engagement
Hours played at review time, across 200 reviews with recorded playtime.
Reviews
Themes across 200 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
positive critical· bar length = how often the theme comes up
Reviews
Loooved this game. Length of game is significantly greater compared to the other Grimoire games (took me two games to try to get every little thing) and greatly improved the story since last game. Characters are great and end was satisfying. Only thing I'd like is a chapter select after the game is completed because you get locked out of precious chapters once you're done with the game and I don't want to play through 90% of the game to get one missed achievement. Otherwise an incredibly great game!!
[h1] En résumé:[/h1] J'ai passé un bon moment sur le jeu et je le recommande. [h1] En détails:[/h1] Le jeu propose une nouvelle enquêtes pour le Détective Grimoire et Sally. Cette fois-ci, ils se retrouvent à bord d'un sous marin pour élucider le meurtre à huis clos du Capitaine Mortuga. Il n'est pas nécessaire d'avoir joué aux premiers jeux du studio pour comprendre ce qu'il se passe dans celui-ci. Il n'y a pas d'horreur ou de jumpscare dans le jeu. [h2] Gameplay:[/h2] Le jeu est un point and click qui ressemble aux précédent jeux de la série. Le gameplay s'articule autour de trois élément principaux: - De l'exploration de scènes pour trouver des indices et des éléments clés, - Des phases de discussions/déductions - Des énigmes Le jeu est facile à pendre en main et le gameplay est bien adapté au style de narration. [h2] Scénario/histoire:[/h2] J'ai trouvé l'histoire plaisante. Le Capitaine Mortuga a été tué dans son sous-marin, il vous revient d'élucider le mystère de sa mort et de comprendre ce qui le lie aux différents personnages présents à bord. Les rebondissements d'enquêtes sont plaisants, le scénario est suffisamment bien écrit pour qu'on ne grille pas direct le coupable. L'écriture de spersonnages est plaisante. [h2] Son:[/h2] Les musiques sont bien choisies. L'ambiance sonore est également bien faite. Les personnages sont tous doublés en anglais, les acteurs réussissent une bonne perfomance. Je trouve que le doublage des dialogue rend les phases de discussions dynamiques et rajoute de l'émotion. On sent que beaucoup de soin a été apporté à l'aspect sonore du jeu. [h2] Visuel/Direction Artistique:[/h2] J'ai beaucoup apprécié le style visuel du jeu. Entre la direction artistique des personnages, les animations de ceux-ci (qui semble faite à la main) et l'ambiance visuelle du sous marin, on sent la maîtrise du studio de développement pour donner vie à son univers. C'est avec plaisir qu'on retrouve Sally et le Détective grimoire avec leur gimmick et leur humour noir. [h2] Durée de vie:[/h2] Le jeu se finit en une douzaine d'heure en prenant son temps. Le jeu peut se finir en 3h-4h en cas de succès manqués. A ce jour (19/7/2026) il n'est pas possible de sélectionner un chapitre à rejouer, pour rejouer une portion du jeu il faudra relancer une partie complète. La durée de vie est satisfaisante. Les succès ne sont pas difficile à obtenir. [h2] Technique:[/h2] [u]Sur mon PC principal: [/u] Le jeu tourne très bien et je n'ai eu aucun problème technique susceptible de gâcher mon expérience (sachant que je ne joue pas spécialement sur un OS supporté par les devs). [u]Sur le Steam Deck: [/u] le jeu met à profit l'écran tactile et les éléments d'interface ont une taille suffisante pour le Deck ce qui est bien agréable. Sinon il est possible d'utiliser les stick pour déplacer le curseur et la gachette droite pour "cliquer". Le jeu tourne sans problème du peu que j'ai testé sur le Deck (J'ai joué une vingtaine de minutes) [h2] Au final:[/h2] J'ai beaucoup aimé le, jeu, un grand merci aux équipes qui ont travaillé dessus. C'est du beau travail, on sent l'amour du studio pour ce genre de jeu et pour leurs personnages. J'ai très hâte de découvrir leur prochains jeux.
Very Charming. Gives a deep drive on point and click games. Point's in all the right direction's for a best follow up. Navigates you to a magical time. Get's the green light from me.
系列老玩家了,从沼泽案入坑,主要是好这口美术和配音,对剧情和案件要求不高。[b] 但是 [/b]这一作明显有进步,与前作缠结塔相比,角色不再局限于沾亲带故的一家人,角色形象和动机显得更丰富;与更早的沼泽案乃至网页flash版的马戏团案相比则有了更优秀的氛围和叙事,挖坑不填的情况也有所改善,显得完成度更高了,打完之后非常满意,[strike]不像缠结塔结局让人感觉“就这”??[/strike]特别是这一作的超自然生物要素平衡得比较好,没有特别强的违和感。很期待未来还会有新的作品!接下来要回头重新玩一下缠结塔,细品本作的进步了。
Excellent writing so far. The vibes of this submarine are incredibly eerie. Every room you explore is super detailed, and clicking on any remotely interesting object results in some nice dialogue. The character designs are super endearing, and the music is haunting. The puzzles are great so far, whether they're done to open up a locked box or to connect some information using logic.
A game worth waiting for. I waited for years and it exceeded expectations. I had an amazing time and it's a great addition to the series. I don't know how I ended up having 22 hours on this game though, I think I spent a lot of time looking around, exploring, and talking to people... Goes to show how much fun I had lol. I hope one day, the devs will put up the original flash game. Every game has a lot of charm and whimsy, and it all began back with the original "Detective Grimoire", which I still go back to from time to time. I basically grew up with this series, which goes to show how good it is to continue following it nearly two decades later. They're all worth playing, you can see improvements and ideas evolve over time, and yet each one continues to be good and shown a lot of care. There's never a moment where you feel the creators were slacking or phoning it in.
Just as good as the first, and largely more refined. Maybe it was just familiarity with Tangle Tower, but I didn't feel like I stumbled nearly as often in either puzzles or investigation. An excellent sequel by every measure.
one of my most anticipated games :D it was amazing just like the others
Holy peak. Cannot recommend this game enough!! Please give it a try, I can promise you it won't let you down. (play tangle tower first tho ofc!)
So worth the wait! This game is INCREDIBLE! I love all of the Detective Grimoire games, and this one had me hooked right from the start. I love how unique the puzzles are and how I felt so accomplished after solving them. 10/10 amazing amazing game!
Related
Related
Trends
Steam followers (game-group members) tracked daily from when we started recording.
Momentum
Pace estimated from the game's recent review growth (our daily snapshots) at its own sales-per-review ratio — a momentum signal, not booked sales.
Audience
Audience
Games most often reviewed by the same players — an audience-affinity signal from our review sample, not full ownership data.
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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