Single-player
Adventure
Casual
Indie
Steam Achievements
Full controller support
Custom Volume Controls
Mouse Only Option
#category_playable_at_your_own_pace
Playable without Timed Input
DualShock Controller Support
DualSense Controller Support
Save Anytime
Touch Only Option
Steam Cloud
Family Sharing
2026
Download Not Available
Steam Store
The Mermaid Mask
File Size: 1 GB
Rating: 100% (Overwhelmingly Positive)
Added Date: Aug 16, 2026
Downloads: 0
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.
Pre-installed Notice
This game is already pre-installed for you, meaning you do not need to run any setups or installer files. Simply extract the folder, double-click the game executable as Administrator, and play instantly!
Download Unavailable
This release page is live, but the download is not available yet. Keep the page bookmarked and check back once mirrors are enabled.
About The Game
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
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
How to Install
1. Download the game using any of the mirrors above.
2. Extract the archive using WinRAR or 7-Zip.
3. Turn off your antivirus or add the extracted folder to exclusions (to prevent crack files deletion).
4. Run the game .exe file as administrator.
5. Play!
2. Extract the archive using WinRAR or 7-Zip.
3. Turn off your antivirus or add the extracted folder to exclusions (to prevent crack files deletion).
4. Run the game .exe file as administrator.
5. Play!
Download Mirrors
Downloads are currently disabled for this release.
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System Requirements
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OS: Windows 10 or later
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Processor: Intel Core i3 or equivalent
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Memory: 2 GB RAM
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Graphics: Intel HD Graphics
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Storage: 1 GB available space
Game Info
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Genre: Steam Achievements, Full controller support, Custom Volume Controls, Mouse Only Option, #category_playable_at_your_own_pace, Playable without Timed Input, DualShock Controller Support, DualSense Controller Support, Save Anytime, Touch Only Option, Steam Cloud, Family Sharing
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Developer: SFB Games
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Platform: PC
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Game Size: 1 GB
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Released By: SFB Games
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Version: Build 24268115
- Pre-Installed Game No Setup Needed