The Guardian's review praises The Mermaid Mask, the latest instalment in the Detective Grimoire series of comedy whodunnits, calling it worth its seven-year wait despite some room for improvement. Developed by SFB Games, it follows detective Grimoire and sidekick Sally as they investigate a locked-room murder aboard a submarine, building on the formula established in Secret of the Swamp and refined in Tangle Tower.

Players explore the submarine's rooms, gathering clues and solving logic-based puzzles before presenting evidence to a colourful cast of suspects in fully voice-acted conversations, which the reviewer identifies as the series' real strength. New additions since Tangle Tower include 3D animations illustrating suspects' recollections, though the underlying deduction system of filling sentence blanks remains unchanged from previous titles. The reviewer notes some drawbacks, including a weaker soundtrack, occasional pixel-hunting when clues run out, and pacing issues in the final chapter's more rigid checklist structure; the game is available on PC, Nintendo Switch/Switch 2 and PS5.