
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 1510 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
故事好好 角色設計都好好 玩完遊戲會覺得故事好完整
This game is so absolutely peak that I would get lost in the ocean with the mermaids tongue to be able to play this game a second time
An amazing addition to the series!
Media

Related
Related
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 | 993 | 87% | $34.99 | |
| $1M | 2K | 58% | $19.99 | |
| $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 | |
| $83.2K | 222 | 84% | $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
My goodness, what an experience!!! 2 years ago I played "Crow Country" the first SFB Games production I had ever played, which has become one of my favorite experiences as of recent, and earlier this year I played through "Tangle Tower", and a week or so ago I finished this game, "The Mermaid Mask"! I am now completely onboard for whatever SFB Games makes going forward!! Y'all make whatever you WANT, I will be there DAY ONE! "Tangle Tower" was already a visual and puzzle-solving treat, and "The Mermaid Mask"not only delivers on its predecessor, but pushes its visual department further, the production values are a treat to behold: 3D Clues that you can view from different angles to discern more from them, [spoiler]FULLY ANIMATED SEQUENCES???BOTH WITH CHIBI 3D CHARACTERS AND 2D SEQUENCES????[/spoiler], and GOD, the COLOR PALETTES, part of my job revolves around Color Palettes, so trust me when I tell you that this game has some OUTSTANDING work on that department, every single locale in this game was a delight to discover. This game hooks you from the first minute and does not let go! The characters are all intriguing and fun to listen to absolute KUDOS to the every single Voice Actor in this game and the writers, some of them were grander than life, others felt people you might stumble upon on the street, and every single one of them was memorable on their own unique way! I WENT OUT OF MY WAY TO INTERACT WITH ALL OF THEM AS MUCH AS I COULD, THE GAME DIDN'T NEED TO PUSH ME OR TELL ME TO DO SO I JUST DID IT BECAUSE THEY ARE THAT GOOD!!! ACTUALLY STAYED UP PLAYING PAST MIDNIGHT A COUPLE TIMES!!! If you love puzzle games, point-and-click-adventure-games, fun characters, and mysteries that will keep you guessing, this is a VERY easy game to recommend, I would even dare to say you don't even need to play past entries to get into it! (But I would STILL recommend you do, because "Tangle Tower" is THAT fun).
Absolutely fantastic murder mystery game. Really well voice acted and done extremely well. Wonderful addition to the series :)
A very fun and whimsical detective experience. It definitely has a family-friendly tilt to it, so the puzzles won't be the most intricate you've ever seen, but they are still quite fun. This has been on my wishlist for well over a year (ever since I beat Tangle Tower), and despite delays is WELL worth the time and money. All of the characters are well animated and voiced, which is awesome for a game where dialog is 80% of the gameplay. They're all so memorable and lovable. This is a labor of love and it shows, which is a welcome reprieve in this gaming market. I'm looking forward to any additions to the series (or really anything by SFB; keep up the good work!!)
Mermaid Mask is a fantastic detective game! Perhaps one of the best. This is the kind of game that makes a great alternative to watching a movie with your family. It's a classic who-dunnit murdery mystery with puzzles and clues to solve, but designed in such a way that makes it really intuitive for anyone 12+ to follow and is highly interactive. Even though it feels like it was designed for younger audiences, it's extremely well written, with interesting and unique characters, and a narrative that feels fresh and enjoyable even for an older gamer. My friends daughter (12) was fully engrossed and coming to her own conclusions throughout playing. It helped her think critically about things like motive and inconsistencies, and a great alternative to sit passively watching another film or TV show. Overall, this is a great family friendly game and a great way to engage a younger audience in a way that gets them really thinking, and puzzles that will challenge you without being frustrating. Mermaid Mask is an easy 10/10 for what it's trying to be and who it's for.
Please do not let this be the last foray we have with the big DG and SS. I had never heard of this series and played all four games over a weekend, and then was actually stricken by severe depression knowing that there is no more. Especially with the Marmaids mask and Tangled Tower. They obviously have finally hit their stride with the series in these lat two games. This needs many many more games. Genuinely heartbroken theyre saying they cant do more because of how expensive and difficult it is, although i understand, but this game needs to get more momentum. People we need to convince SFB that they cant leave this IP to fester for a long time without more work into it. This is an all-timer series in this genre. Right now there is no modern equal. Buy the game, tell your friends who like this stuff, buy it for them if you can afford it, gush about it to strangers. It is the plug to fill the hole left in the wake of Layton and Phoenix Wright. It is the successor to these games. SFB please do not leave this to be forgotten too long. You have done something genuinely masterful here.
The Mermaid Mask is undoubtedly the best of the Detective Grimoire series. Whereas the original was very short, and Tangle Tower ended rather abruptly, without concluding its mystery in the most satisfying of ways in my opinion, this game manages to wrap up in a fulfilling sense. The main draw of this series, as always, remains its intensely charming art, and it is no different in this instalment. Everything about the visuals is as beautiful as ever, with the 'paper' look making each character be full of personality, and their voice acting adds tremendously to that. Somehow, once again, about half the cast has such soothing voices that I genuinely get the same effect as listening to ASMR. Zephyr, Mariana, hell, the entire killer reveal was so captivating, largely because of some stellar voice acting. The puzzles in the game are fairly simple, but an enjoyable breaking up of the visual novel aspect. The hints are generally pretty well done, and I've always liked the three tiers of hints you have access to, depending on how often you fail. I do wish there was a bit more of a clear explanation of what elements in a puzzle are moveable, because sometimes I used the hints just for that, and nothing else. It's possible I overlooked some part of the UI telling me that they were interactable, but if that's the case, it's equally my fault, and the game's fault, in my opinion. It wasn't a big deal or anything, just like 3 minutes extra of game time here and there. There is one puzzle that I wouldn't say 'aggravated' me, but I think the game could have done a better job of explaining that, perhaps I should explore more locations and talk to more people, before I try my hand at the puzzle. All the hints would say would be like "Hey, this is just like X's diary," which I already knew, but I didn't know I needed more information. It was the only puzzle in the game which I remember needing to explore more for, rather than being able to solve it the moment you have access to it. Finally, let me talk about the writing, and the story. Because the writing is as enjoyable as ever. I love how every single thing you interact with has some kind of dialogue attached to it. It's a problem I've seen in many mystery games I've played over the past few years, where they do an alright, or even good job at the main story bits, but don't have nearly enough optional dialogue to really build their characters up. While the dynamic between Sally and Detective Grimoire might not be the most original, nor is their humour, that doesn't matter. Something doesn't necessarily need to be completely unique for it to work, and this game is proof of that, because I thoroughly enjoyed reading through every piece of dialogue. A lot of that came down to the excellent voice acting, but there were plenty of fun moments because of the writing as well. The story... that's probably where I have the biggest problem with this game. And that's being overly dramatic, because honestly, right now, I'd say I count this game as maybe an 8,9/10. So, absolutely superb. However, while the story is much better than its predecessors, I was still left with some questions I would have liked to see answered. Not about the killer, or what ends up happening with them. I actually love that the game is smart enough to not explain everything about their fate. But there's some evidence that I feel like had very little relation to the main plot. And not in the way that it was filler evidence, but I distinctly remember there being a recording of a character not seen up until that point, and never seen again, and I don't think the game explained what was going on with that. Maybe I'm mistaken, or maybe I missed things, but I went out of my way to present every piece of evidence to every character - largely because Zephyr and Mariana's voices made me so relaxed - and I still didn't get an answer. It's also the case that I don't consider the actual murder or its method to be the most compelling. I love the motivation behind it, it feels so tragic, yet so believable. I could understand why the murderer did it, and even think that, had I been in their spot, I could have done the same. But the way the actual murder happens feels a bit throwaway, just like in the other Detective Grimoire games. This is no Ace Attorney or Danganronpa, where you discover some insane method that the killer used. No, the actual practical stuff is somewhat underwhelming. I didn't go into this game expecting a revolutionary murder, because, as I've said, the other games in this series led me to believe that wasn't going to happen. But considering how much I ended up loving the motivation behind the murder, it's just a little bit sad that the method wasn't equally as captivating. I paid approximately €18,70 for this game, and I would say that's less than what it is worth. The base price is €20,50, and I would say that that's about what I would value it at as well. Maybe more of a €20, but that's just because I prefer a round number. The Mermaid Mask is well worth its asking price, and it's currently looking like one of my favourite games that came out this year.
故事实在是令人唏嘘,通关后久久不能释怀。 海面之下压抑着人鱼哀恸的吼声,海面之下悬坠着漂流之船虚无的终点...
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