hidden-achievements-guide

id: "hidden-achievements-guide" slug: "hidden-achievements-guide" order: 2 title: "The Incident at Galley House Hidden Achievements — How to Unlock All 5 Secret Achievements" description: "Detailed guide to unlocking all 5 hidden achievements in The Incident at Galley House. Hallucination, Spectronoeticist, Inciting Incident, Not Over Yet, and Full House." keywords: ["The Incident at Galley House hidden achievements, secret achievements, Hallucination, Spectronoeticist, Full House, Inciting Incident"] category: "achievements" date: "2026-07-15" lastModified: "2026-07-16" image: "/images/hero.webp" video: ""

Hidden Achievements Guide for The Incident at Galley House

The Incident at Galley House has 5 hidden achievements that do not appear in the standard Steam achievement list until you unlock them. These achievements require specific actions beyond normal story progression. This guide provides detailed instructions for unlocking each one.

Hallucination

What It Is

The Hallucination achievement is earned by viewing a hidden supernatural scene that exists outside the normal timeline. It is one of the more mysterious achievements in the game and requires finding a specific code that is not part of the standard scene sequence.

How to Unlock

The Hallucination code is hidden within the game's narrative. To find it:

1. Pay attention to scenes involving the Chapel (CH) — the supernatural center of Galley House
2. Listen for dialogue that references visions, specters, or hallucinations
3. Use the keyword search tool to search for "hallucination," "vision," and "specter"
4. The code format follows the standard Timestamp-Location-Characters pattern but uses a special combination
5. If you cannot find the code through investigation, request hints from the progressive hint system

Tips

• The Hallucination scene is not required to complete the main story, only for this achievement and Spectronoeticist
• The scene contains supernatural content that expands on the game's lore
• Finding this code rewards thorough investigation and attention to subtle narrative clues

Spectronoeticist

What It Is

Spectronoeticist is the hardest achievement in the game. It requires viewing every single memory scene, including all main scenes, hidden scenes, and special scenes.

How to Unlock

You must find and view all of the following:

• All 26 Part 1 main scenes (01 through 26)
• All Part 2 present-day scenes
• Scene 00 (the prologue)
• The TYPE HELP meta-scene
• The Hallucination scene
• The +64 hidden scenes
• Any other optional or secret scenes

Strategy

1. Use the complete scene codes list as a checklist
2. Systematically enter each code and mark it off after viewing
3. Use the keyword search tool to find references to scenes you might have missed
4. Request hints for any gaps in your progress
5. The achievement tracker shows your completion percentage

Tips

• This achievement is best attempted after your first playthrough
• Keep a personal checklist of viewed scenes to track progress
• The Spectronoeticist achievement is the last one most players earn

Inciting Incident

What It Is

The Inciting Incident achievement is earned by discovering the event that started everything — the root cause of the deadly night at Galley House.

How to Unlock

This achievement requires connecting information from both timelines:

1. View scenes from both Part 1 and Part 2
2. Look for the connection between the Galley family, D&M, and the supernatural elements
3. Make the correct deduction on the deduction board about the overarching cause
4. The meta-plot deduction is required — you cannot earn this through scene viewing alone

Tips

• This achievement is tied to the meta-plot, which is the deepest layer of the mystery
• You need a thorough understanding of both timelines
• Request hints if you are struggling with the meta-plot deduction

Not Over Yet

What It Is

The Not Over Yet achievement rewards players who continue investigating after the main story appears to end. There is additional post-credits content that reveals more about the meta-plot.

How to Unlock

1. Complete the main story (all primary deductions resolved)
2. Continue operating the machine after the apparent conclusion
3. Look for new scenes that become available after the story "ends"
4. Enter codes and explore the machine — new content will appear

Tips

• Do not close the game or stop playing when the credits seem to indicate the end
• The post-credits content is accessed through normal code input
• This achievement rewards persistence and curiosity

Full House

What It Is

The Full House achievement requires labeling all 16 locations in Galley House. This is similar to the House Tour achievement but specifically requires correctly labeling each room with its two-letter code.

How to Unlock

1. Discover all 16 location codes by entering codes that reference each room
2. Label each location with its correct two-letter code
3. Confirm all labels on the deduction board or location interface

Tips

• The two-letter codes are fixed and never change between playthroughs
• Most ground-floor rooms are discovered early; upper-floor rooms come later
• Wintercote (WI) is typically the last room players discover
• If you have earned House Tour, you likely have most of what you need for Full House

Achievement Completion Strategy

For the most efficient path to 100% completion:

1. Play through the main story — Earns all story and deduction achievements
2. Discover all 16 locations — Earns House Tour and Full House
3. Enter TYPE HELP — Earns the TYPE HELP achievement
4. Find the Hallucination scene — Earns Hallucination
5. Solve the meta-plot — Earns Inciting Incident
6. Explore post-credits — Earns Not Over Yet
7. View every scene — Earns Spectronoeticist (the final achievement)

Following this roadmap ensures you earn achievements in a natural order without unnecessary backtracking. For the complete achievement guide including non-hidden achievements, see the main achievement page.