The Posthumous Investigation
All 28 Achievements Guide

Complete Motive + Means + Opportunity chains and submit the correct suspect. See Walkthrough Phase 2, Loop 16.

Collect port evidence (18:00+), café meeting testimony (12:15–12:45), secondary conspirator evidence, and build the extended True Ending board. See Endings Guide.

Build a complete Motive + Means + Opportunity chain pointing at the wrong suspect and submit the accusation. Best done in Phase 3 Loop 26.

Requires a second playthrough with full case knowledge. Use the 3-loop critical path from the Tips & Tricks guide. Must be done on a fresh save.

Open the Thinking Board and drag a connection line between any two nodes. Triggers in any loop.

Build a full chain with at least one Evidence anchor and submit it as part of an accusation attempt.

Complete all three chains before submitting the accusation. The achievement triggers on board review, not accusation submission.

Simply complete or reset your first loop. Triggers automatically at the start of Loop 2.

Triggers automatically at the start of Loop 11. No special conditions.

Triggers automatically at the start of Loop 26. No special conditions.

Triggers at the start of Loop 38 (or later). No special conditions other than total loop count.

On a fresh save, open the Thinking Board in Loop 1 or 2, place any minimal chain, and submit a wrong accusation. Must be done within first 2 loops — requires a dedicated fresh save.

Move directly to the garden at game start (07:00). The achievement triggers on arrival, not on observing the monologue.

Simply avoid resetting or having the loop end before 22:00. Stay in the port district in the evening — it keeps you engaged past 22:00 naturally.

Find the hostile suspect (identifiable by his unusually aggressive reactions) and select the fight-instigating dialogue option. The physical confrontation achievement triggers immediately.

Speak to Marie Grant at morning, midday, and evening time windows in the same loop with maximum knowledge state. All branches must be exhausted. Best done in Phase 3 Loop 33.

Using cross-character knowledge, introduce information that validates a suspect's private fears or concerns. Their trust level maxes when they voluntarily share information you didn't ask for.

Complete all three chains before attempting any accusation. The achievement triggers on the board review screen when all three chains are first complete simultaneously.

Requires efficient routing. Plan a loop where every suspect's schedule is hit in sequence. All 14 must be spoken to (even a greeting counts) before the day ends.

Visit the Port District after 18:00 in any loop. The new accessible area generates the achievement on first entry.

Requires: (1) exhausting the Brás Cubas ghost dialogue fully, (2) returning to the victim's study after the True Ending, (3) examining a specific object three times. The hidden location appears after the third examination.

Requires hitting all locations including the port, garden, and all building interiors in one day. Plan the route carefully to beat the port's daytime closure and the garden's morning window.

Exhaust Brás Cubas ghost dialogue in multiple loops. A specific response option referencing Capitu appears only with maximum loop count + full board completion. Select it.

Found in a specific suspect's dialogue when you've identified both endings and have maximum knowledge. The philosophical debate option appears in their evening dialogue branch.

Triggers on any rejected or wrong-suspect accusation. Most players get this naturally during their first accusation attempt.

Get the Standard Ending first (Loop 16 area), then the True Ending in a subsequent loop. Triggers automatically after the True Ending completes.

Unlock every other achievement. This meta-achievement triggers automatically when the last remaining achievement is unlocked.