
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 1527 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
I read so quickly that unskippable dialogue fills me with rage. The voice acting in this game - no, this series - is so good I didn't want to skip anything. Can't wait for the next one!
I had a great time with this game! If you liked Tangle Tower you will love this game. There's improvement on every front and I really really hope they make another game. I would say more but I don't want to spoil anything. JUST PLAY THE GAME. I'm sure anyone who enjoys a good mystery with good puzzle design will enjoy this game.
Media

Related
Related
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
Everything that was amazing about Tangle Tower has been transferred over to Mermaid Mask and improved upon 10 fold! A++ game! Loved every minute! Gathering the clues and listening to the characters to puzzle out the murder was very satisfying. I think there were about two puzzles that I got super stumped on, but nothing to make me incredibly frustrated. Just sometimes wished they would let me know what piece I had right. Otherwise, A beautiful and fun murder mystery. I am making my friends play this >:)
Amazing, I loved every bit of it. Ending is better explained than in tangle tower. I am very mad that I finished it.
Großartig. Toller Plot, nette Rätsel, Gutes Voice-acting, Werde es sicher noch mehrmals spielen.
good
From the writing, voice acting, art, music all the way to the animation and puzzles - you can feel the heart put into this game. I loved my time with this new Grimoire adventure.
Incredible voice acting, art, and design. Most of the game is dialogue, and the amazing voice acting really helps you pay attention to the story and pick up clues while keeping you entertained and engaged. The mystery is very satisfying to solve, though some of the puzzles could have been made more challenging.
This game was an utter delight to play! The gameplay was fun, the music was enjoyable, the voice acting and characters were so engrossing that I actually wanted to exhaust every bit of dialogue from them, the art style is so unique and pretty, and the story was great from beginning to end (I think the devs took note of some people's complaints about the ending of Tangle Tower and went the extra mile out with this ending, cause dang). I also really liked the little quality of life ways this game helps you progress, in case you might forget something or get stuck.
Same formula with new characters, that are even more fun to interact with and uncover their secrets. Main case hooks right away and the soundtrack is a vibe. Really good sequel, hope there will be more installments in the future.
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.
Related
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|---|---|---|---|---|
| $1.8M | 6.8K | 95% | $19.99 | |
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Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| $1.1M | 3.6K | 81% | $9.99 | |
| $1.1M | 1.3K | 90% | $19.99 | |
| $1M | 1.7K | 63% | $19.99 | |
| $1M | 2.9K | 89% | $14.99 | |
| $1.1M | 7.7K | 94% | $12.99 | |
| $1M | 2.6K | 96% | $11.99 |