About This Wiki
Everything you need to know about theposthumousinvestigation.wiki — who we are, what we cover, and how this guide was built.
🔍 What Is This Site?
theposthumousinvestigation.wiki is an independent fan guide and wiki for The Posthumous Investigation — the 2026 point-and-click mystery adventure by Mother Gaia Studio, published by CriticalLeap. This site is not affiliated with, endorsed by, or sponsored by Mother Gaia Studio or CriticalLeap.
The guide covers every aspect of the game: a full walkthrough organised by loop phase, complete character profiles for all 14 suspects, all 28 achievements with unlock conditions, location guides, the Thinking Board system, time loop mechanics, and detailed strategies for every ending. The site was built to be the most thorough English-language resource for the game available anywhere.
📚 What We Cover
Full Walkthrough
Three-phase loop walkthrough covering all information loops, evidence loops, and both endings.
14 Character Profiles
Every suspect with daily schedule, motive, dialogue strategy, and investigation tips.
All 28 Achievements
Complete achievement guide with unlock conditions, difficulty ratings, and missable flags.
All Locations
Every accessible area with evidence, NPC schedules, and time window information.
Thinking Board Guide
How to build valid accusation chains — Evidence vs. Testimony nodes, outside-in construction, rejection diagnosis.
Time Loop Guide
The complete time loop system explained — what resets, what persists, and how to plan efficient loops.
All Endings
Standard Ending, True Ending, and False Conviction ending — with complete spoiler warning and unlock conditions.
Full FAQ
35+ answered questions across gameplay, technical, story, and achievement categories.
⚖️ Disclaimer
This site is an independent fan resource. All game content, characters, images, and trademarks referenced on this site are the property of Mother Gaia Studio and CriticalLeap. Game screenshots and imagery used on this site are sourced from official Steam media (store.steampowered.com) for illustrative purposes in compliance with Steam's media usage guidelines.
The guide content — walkthroughs, analysis, strategies, and commentary — represents the original editorial work of this site's contributors. If you are a rights holder and have any concerns about content on this site, please contact us via the Steam community forums for The Posthumous Investigation.
🌐 Languages
This wiki is available in all six languages supported by The Posthumous Investigation on Steam. The homepage is fully localised. Individual guide pages fall back to English where localisation is not yet complete.