Steam app 1696770 · updated 12 Sep 2026, 19:21 UTC
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.
720 hourly samples, with the daily peak drawn over them. Weekends are shaded.
3 months, July 2026 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
12 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 437 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 283 hourly samples. Each dip is a night. Weekends are shaded.
The Mermaid Mask was released on 16 Jul, 2026.
| Language | Full audio |
|---|---|
| English | ● |
| French | |
| Italian | |
| German | |
| Spanish - Spain | |
| Japanese | |
| Korean | |
| Portuguese - Brazil | |
| Russian | |
| Simplified Chinese | |
| Spanish - Latin America | |
| Traditional Chinese |
A blank audio cell means full audio was not marked in the returned language list.
Launch Trailer
Watch on Steam
Launch Date Announcement 2026
Watch on Steam
Announcement Trailer 2026
Watch on Steam21 achievements in total.
16 developer announcements, Jan 2026 to Jul 2026 · times in UTC
That is the whole message. Everything below is optional.We just wanted you all to know how grateful we are for all the love and support for The Mermaid Mask around the game's release.The Last Seven DaysReleasing a game is nerve-wracking.…
SarahPanicDepartmentHi everyone! Another update for you today, focussing on helping folks find their way through the game. Added icons to indicate when a clue in your casefile might need reading, using or otherwise interacting in order to progress the story…
Patch notesHello everyone, Adam and I have fixed some issues that folks have reported, and a few we noticed after watching others play! Fixed issue with puzzles where the game got stuck between asking for a clue, then asking for a specific part of the…
Patch notesAt last, the wait is over: The Mermaid Mask is out now!We sincerely hope you enjoy your time aboard the Mortuga Seafoam submarine. If you do, please consider leaving a review on Steam. It is a small gesture, but an enormously consequential…
SarahPanicDepartmentThe Mermaid Mask is OUT TOMORROW!!!We are partnering with Convergence Games Showcase for our launch. You can check out their live stream on Twitch on 16th July, 11:00AM PT / 14:00PM ET / 19.00PM GMT / 20:00PM CEST. But there’s only one…
SarahPanicDepartmentAll hand on deck - it's ONE WEEK TO GO! This time next week we'll be celebrating the launch of The Mermaid Mask, but before we disappear beneath the waves for final preparations, we’d love your help with one final push. We’re incredibly…
SarahPanicDepartmentAfter recently playing Secrets of the Swamp and Tangle Tower, Gab Smolders has shared an early preview of The Mermaid Mask!It’s a Let’s Play, and we’re excited to have her take an early look at the game. Check it out for a sneak peek before…
SarahPanicDepartmentPrepare for the launch of The Mermaid Mask with us!Hit the big blue "set a reminder" button to get a ping when the game goes on sale on 16th July.Sign up to our socials for release updates, behind-the-scenes extras, and everything you need…
SarahPanicDepartmentWe’re thrilled to announce that The Mermaid Mask launches on Steam on July 16, 2026.All aboard the world’s strangest submarineSummoned by the mysterious Captain Seafoam, Detective Grimoire and Sally arrive with only a cryptic letter, two…
SarahPanicDepartmentIn the last post, we opened the case files on Symmetry Silkmoth, Godrik Gripp, J.D. Wirman, and Madam Tadpole. But there are still more suspects to meet aboard the Mortuga Submarine, and they’re just as worth side-eyeing. This time, we’re…
SarahPanicDepartmentWe're revealing the cast of The Mermaid Mask.Over the next few posts, we’ll introduce the characters, the voice actors behind them, and a few clues about what makes each one worth paying attention to.Let’s open the files.Known for: Being a…
SarahPanicDepartmentWe’re happy to announce that The Mermaid Mask will launch with support for the following languages: • French • German • European Spanish • Latin American Spanish • Brazilian Portuguese • Italian • Japanese • Korean • Simplified Chinese •…
SFBTomA huge thank you to everyone who played the demo, streamed it, shared the game, or dropped feedback and theories. Seeing so many people dive into the mystery is an absolute joy.⬢ 𝘿𝙀𝙈𝙊 𝘿𝙊𝙒𝙉𝙇𝙊𝘼𝘿𝙎 ⬢During the festival the demo welcomed…
SarahPanicDepartmentSteam Next Fest is halfway done.The demo is live.The crew of the Mortuga submarine remain deeply suspicious.It felt like the right moment for a little mid-week pick-me-up.So we set up a competition!StorytimeWe’ve been working away here at…
SarahPanicDepartmentHappy Next Festmas, Grimoire-fans and Sally-stans!⬢ 𝙎𝙏𝙀𝘼𝙈 𝙉𝙀𝙓𝙏 𝙁𝙀𝙎𝙏 ⬢The free demo for The Mermaid Mask is LIVE ⚓︎If you’ve already played it: good news, we’ve updated it. New tweaks. New polish. Fewer “was that meant to happen?” moments.…
SarahPanicDepartmentDetective Grimoire and Sally will return in 'The Mermaid Mask' in 2026. Thanks for your patience! I can't wait to share it with everyone. (The first delay was largely due to Crow Country, and this second delay is a normal 'every project…
SFBTomWhat Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | The Mermaid Mask.exe | windows | ||
| Launch | The Mermaid Mask.app | macos |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
gameinstall | Saves/ | *.sav |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG