Player casebook · App 1696770
The Mermaid Mask
The Mermaid Mask is SFB Games’ single-player point-and-click mystery about an impossible locked-room murder aboard the Mortuga Submarine. Captain Mortuga is found dead beside an ancient cauldron, leaving Detective Grimoire and Sally to inspect a handcrafted 3D crime scene, question an eccentric crew, and work through the ship’s puzzles. This wiki keeps the investigation in one compact casebook: start with the ordered walkthrough, open progressive puzzle hints only when you need them, track Steam’s 21-achievement total, or review the spoiler-safe suspect roster before returning to the game.
How this casebook works
Control the depth of every clue
The central job of this wiki is to get you moving again without taking the investigation away from you. A puzzle entry begins with an observation: the room, object, conversation, or interface element that deserves another look. The next layer gives a directional nudge that identifies the kind of connection to test. An exact action belongs in the final layer. That order matches a mystery built around inspection and deduction better than a wall of answers, and it lets two players use the same page at different spoiler tolerances.
The walkthrough follows the same rule at a larger scale. It organizes progress around the current investigation task, checks the evidence you should have seen, and separates required progress from optional interaction. The achievement and suspect files use dense ruled ledgers rather than decorative cards, so names, counts, roles, and source boundaries remain easy to scan. Every core file is linked directly from this page and back to the other player jobs; you should never need browser search to move between a puzzle, its place in the investigation, and a relevant checklist.
Choose a file
Investigation index
Five focused routes cover the whole launch casebook without fragmenting chapters, puzzles, or suspects into thin pages.
Complete walkthroughFollow the investigation in order, with evidence checks, deduction habits, and deliberate spoiler boundaries.
Puzzle solutionsUse observation, directional nudge, and exact-answer layers instead of exposing the whole mystery at once.
21 achievementsTrack the verified total and the ten achievement names highlighted by Steam’s official store data.
Suspect rosterReview the developer-revealed suspect names and principal case roles without revealing the culprit.Verified game file
What the official release confirms
The official Steam record identifies The Mermaid Mask as an Adventure, Casual, and Indie game developed and published by SFB Games. Steam records the release date as July 16, 2026 and describes the opening as an impossible locked-room murder: Captain Mortuga lies dead beside an ancient cauldron aboard a submarine crewed by suspicious characters. The store connects it to the creators of Tangle Tower and Crow Country, while presenting this case as a handcrafted point-and-click mystery with sharp humour and tricky puzzles.
On Steam the game is single-player, supports Steam Achievements and Steam Cloud, and allows saving at any time. The accessibility-oriented input features listed in the store data include full controller support, a mouse-only option, a touch-only option, and play without timed input. Windows and macOS are supported; Linux is not listed. The store reports 21 total achievements. English is the only language marked with full audio in the captured official record, while interface and subtitle support also covers French, Italian, German, two Spanish variants, Japanese, Korean, Brazilian Portuguese, Russian, Simplified Chinese, and Traditional Chinese.
- Developer / publisher
- SFB Games
- Steam release
- July 16, 2026
- Platforms
- Windows and macOS
- Verified achievement total
- 21
Choose the right file
Move from the case to the exact player task
Open the walkthrough when your problem is sequence: you do not know which room, conversation, clue, or deduction should come next. Open puzzle solutions when the current objective is clear but the mechanism is not. The puzzle desk is deliberately separated from the full route so that a player can solve one obstacle without reading later story beats. The achievements ledger is for completion tracking; it distinguishes the verified total from the subset of names that Steam publicly highlights. The suspect file is for identity and case-role recall, and its entries stop before culprit analysis.
That division also prevents conflicting advice. A walkthrough checkpoint can link to the puzzle desk instead of duplicating an answer, while an achievement note can point back to the ordered investigation instead of inventing a separate route for every chapter. The launch route set stays compact because individual chapter, puzzle, achievement, and suspect pages would currently repeat evidence or expose thin fragments. As official and first-party-verifiable material expands, the roster can gain more fields without changing the responsibilities of these five core URLs.
Official transmission
See the Mortuga case in motion
SFB Games’ official launch trailer is the fastest first-party view of the game’s tone, characters, submarine setting, hand-painted environments, and inspection-driven point-and-click play. This page uses a privacy facade: the YouTube player is not created until you choose to play it. The still image and title identify the source before any connection is made, and playback remains separate from the written guide so a video reveal never becomes a prerequisite for using the casebook.
Use the trailer as orientation, not as a solution source. It establishes the locked-room premise, Detective Grimoire and Sally’s return, and the contrast between outlined 2D characters and painted 3D spaces. The written files below the trailer are organized for action: the walkthrough keeps sequence, the puzzle desk controls clue depth, the achievement ledger preserves exact official names, and the suspect roster keeps identities readable without naming a culprit.
Facts verified · Official The Mermaid Mask Steam page