The Posthumous Investigation
One day. Fourteen suspects. Infinite resets. Master the time loop and solve the murder of Brás Cubas in 1937 Rio de Janeiro.
What Is The Posthumous Investigation?
The Posthumous Investigation is a literary noir point-and-click mystery developed by Mother Gaia Studio (Brazil). Set in 1937 Rio de Janeiro, you play as a detective hired by the recently deceased Brás Cubas — a wealthy socialite who wants you to uncover who murdered him. The catch: you have only one day, and when you fail, time resets.
Inspired by the Brazilian literary classic Memórias Póstumas de Brás Cubas by Machado de Assis, the game weaves dark comedy, social satire, and genuine detective work into a puzzle that demands careful observation across multiple loops. There are no hints, no hand-holding, and no way to fast-forward past the consequences of your choices.
With 14 suspects, a hand-crafted Thinking Board for connecting evidence, and a cast that grows more morally complex every loop, this is one of the most ambitious mystery games of 2026. Upon release it earned 97% positive reviews on Steam.
Everything You Need to Solve the Case
Your complete resource for The Posthumous Investigation walkthrough, strategy, and 100% completion.
Time Loop Mastery
Understand exactly how the 24-hour reset works, what knowledge carries over, and how to use loops efficiently.
Thinking Board Guide
Step-by-step breakdown of how to connect clues, reconstruct the timeline, and make your accusation stick.
All 14 Characters
Complete schedules, dialogue trees, hidden motives, and manipulation strategies for every suspect.
All 28 Achievements
Unlock every achievement including missable and hidden ones with our detailed, loop-by-loop checklist.
Full Walkthrough
Act-by-act breakdown with every optimal action, key conversation trigger, and time-saving shortcut.
Locations & Clues
Every location in 1937 Rio mapped with interactable objects, hidden clues, and NPC spawn timings.
Official Trailer
Watch the official trailer for The Posthumous Investigation before diving into our guide.
📸 Screenshots
⚡ Quick Tips for New Detectives
New to The Posthumous Investigation? These core tips will save you from wasted loops:
Observation First, Action Second
Your first loop should be pure reconnaissance. Don't try to prevent anything — just follow suspects, note their schedules, and identify all interactable objects. Every subsequent loop benefits from this groundwork.
The Thinking Board Is Your Primary Tool
Don't treat the Thinking Board as optional. Every clue you collect must be manually pinned and connected. The game will not tell you when you have enough — only a complete, logical chain leads to a valid accusation.
Time Is Finite — Plan Your Route
You have 24 in-game hours. Traveling between locations costs time. Prioritize suspects who appear in multiple scenes and route yourself to observe them at different times before committing to a conversation.
Dialogue Unlocks Are Cumulative
New conversation branches open based on knowledge from previous loops, not just the current one. If a suspect won't talk about something yet, try completing a different thread first — it may unlock new questioning options.
Everyone Has a Motive
The game's literary foundation means no character is innocent. Even seemingly minor figures have secrets. Read every document, eavesdrop on every side conversation, and treat every interaction as potential evidence.
Reset Without Fear
A failed loop is never truly wasted. Any new information you discover — names, alibis, contradictions — is retained in your memory even after the reset. Treat each loop as an investment in future ones.
❓ Frequently Asked Questions
How many loops does it take to complete The Posthumous Investigation?
Most first-time players solve the case in 8–15 loops. A knowledgeable player using this guide can reach the true ending in as few as 4–5 loops, though the game is designed to be enjoyed across many resets.
Is The Posthumous Investigation available on consoles?
As of March 2026, the game is available on PC (Windows and macOS) via Steam. A Nintendo Switch port has been announced but no release date has been confirmed.
Does the game have multiple endings?
Yes. There are at least three distinct endings depending on your accusation and the evidence chain you build on the Thinking Board. The true ending requires gathering specific evidence across multiple loops.
Can I miss achievements permanently?
Some achievements are tied to specific loop actions and can be missed if you progress past certain story checkpoints without triggering them. Our Achievements Guide lists every missable achievement with precise loop windows.
How long is The Posthumous Investigation?
A standard playthrough lasts 8–12 hours. 100% completion (all 28 achievements) takes most players 15–20 hours across multiple loops.
Is The Posthumous Investigation difficult?
The game offers no hints or hand-holding by design. It is moderately to highly challenging for players unfamiliar with deduction-based mystery games. However, no action skills are required — every challenge is observational and logical.