efficient-investigation

id: "efficient-investigation" slug: "efficient-investigation" order: 20 title: "Efficient Investigation Strategy — How to Progress Faster" description: "How to investigate efficiently in The Incident at Galley House. Time-saving strategies and optimal scene discovery order." keywords: ["efficient investigation, progress faster, time saving, optimal order, speed tips"] category: "tips-and-tricks" date: "2026-07-15" lastModified: "2026-07-16" image: "/images/video-C1DahZmSfDQ.webp" video: "C1DahZmSfDQ"

Efficient Investigation Strategy — How to Progress Faster

The Incident at Galley House takes 8-15 hours to complete, but inefficient investigation can extend that time significantly. Players who lack a systematic approach spend hours entering random codes, rewatching scenes without purpose, and making incorrect deductions. This guide provides a step-by-step strategy for efficient investigation, helping you progress faster while still experiencing everything the game has to offer.

The Optimal Investigation Order

Phase 1 — Foundation (Hours 1-3)

Start by building the foundation of your investigation. This phase establishes the basic framework of characters, locations, and events.

Step 1: Enter chronological Part 1 codes

Enter codes 01-EN-1-11 through 06-DI-3-8-9 in order. These early scenes introduce the main characters and the setting. Label every location you discover immediately — do not skip this step. By the end of step 1, you should have labeled EN, LI, QU, ST, KI, and DI.

Step 2: Identify the early characters

After viewing scenes 01-06, use the keyword search tool to search for the character names and codenames you have heard. Try to identify at least Persons 1, 2, 3, 4, and 11 based on voice recognition and dialogue references.

Step 3: Enter the TYPE-HELP code

Enter TYPE-HELP into the machine to earn the TYPE HELP achievement. This takes 30 seconds and should not be delayed.

Phase 2 — Expansion (Hours 3-6)

This phase expands your investigation to cover mid-game scenes, discover remaining locations, and make more character identifications.

Step 4: Continue with mid-range Part 1 codes

Enter codes 07-BI-5-10 through 14-DI-1-2-3-4-5. These scenes cover the Billiard Room, Chapel, escalating tensions, and the body discovery. Label all new locations (BI, CH, AT, and any upper-floor bedrooms you discover).

Step 5: Identify mid-game characters

After scene 08-CH, try to identify Persons 5, 6, 7, 8, 9, and 10. The dinner scene (06-DI) and mid-game scenes provide identification clues. Use the codename system and voice recognition.

Step 6: First power restoration

When the machine loses power the first time, restore it immediately by following the visual cues around the machine. This unlocks the next batch of scenes.

Step 7: View Chapel scenes

The Chapel (CH) has supernatural significance. Make sure you have viewed all available Chapel scenes before moving on. The Chapel connects to the meta-plot and the Hallucination achievement.

Phase 3 — Deep Investigation (Hours 6-10)

This phase covers the late scenes, the deadly events, and the present-day timeline.

Step 8: Continue with late Part 1 codes

Enter codes 15-KI-7-10 through 26-LI-1-2-3-4-5-6-7-8-9-10-11. These scenes cover the deadly night and the final confrontation. Track character deaths and survival carefully.

Step 9: Second power restoration

Restore power using the D&M facility resources. Pay attention to present-day scene clues about the machine's power system.

Step 10: Unlock and view all Part 2 scenes

Part 2 scenes (codes 27-32) are essential for the meta-plot. View them as soon as they become available. Do not delay — the present-day information reframes your understanding of the past.

Step 11: Third power restoration

The final power restoration requires information from both timelines. Follow the narrative clues and consider the supernatural element of the machine.

Phase 4 — Completion (Hours 10-15)

This phase covers hidden scenes, achievements, and final deductions.

Step 12: Find hidden scenes

Enter code 00-EN-0 for the prologue. Try to find the Hallucination code using Chapel-related clues. Search for Person +64 and Person K.

Step 13: Discover Wintercote

If you have not found Wintercote (WI) yet, search for "grounds" or "outside" using the keyword tool. Enter code 25-WI-9-11.

Step 14: Complete all deductions

Submit all character identifications, fates, causes of death, and the meta-plot on the deduction board. Use hints if any deductions are rejected.

Step 15: Earn remaining achievements

Check the achievement walkthrough for any achievements you are missing. Continue after the credits for Not Over Yet.

Time-Saving Strategies

The Keyword Search Chain

Instead of entering codes randomly, use the keyword search tool to build investigation chains:

1. After viewing a scene, search for key terms from the dialogue
2. Search results reveal references in other scenes — some may be scenes you have not unlocked
3. Use the revealed information to construct codes for those scenes
4. View the new scenes and repeat the process

This chain approach is far more efficient than random code entry because each search gives you targeted leads.

Character-Targeted Investigation

Once you identify a character, find all their scenes quickly:

1. Search for their name and codename using the keyword tool
2. Note every location and timestamp mentioned in search results
3. Enter codes that combine the character's number with those locations and timestamps
4. This builds a complete character arc in minimal time

Location-Targeted Investigation

When you discover a new location, exhaust its scenes:

1. Try the new location code with various character combinations
2. Try timestamps both before and after the scenes you have already viewed
3. This ensures you do not miss scenes in newly discovered rooms

The 15-Minute Rule

If you are stuck for more than 15 minutes without making progress, request a hint. The progressive hint system provides 3-4 graduated nudges that get you back on track without spoiling the puzzle. There is no penalty for using hints, and 15 minutes of spinning your wheels is worse than 2 minutes of reading a hint.

What Not to Do for Speed

Do Not Enter Random Codes

Random code entry has an extremely low success rate because the code space is enormous (26 timestamps × 16 locations × multiple character combinations). Targeted code entry based on search results and narrative logic is far more productive.

Do Not Re-Enter Codes You Have Already Tried

Keep a list of codes you have entered. Re-entering the same codes wastes time and provides no new information. The game tracks which scenes you have viewed, but your own records are faster to check.

Do Not Skip Present-Day Scenes

Skipping Part 2 to focus on Part 1 saves time in the short term but costs time in the long term because you will need Part 2 information for the meta-plot. View Part 2 scenes as they become available.

Do Not Delay Deductions

Submit deductions as you make them. The deduction board provides immediate feedback — if a deduction is wrong, you know to keep investigating. Delaying deductions means you accumulate untested beliefs that may be incorrect.

Optimal Playthrough Time Estimates

Deduction Board Workflow

An often-overlooked aspect of efficient investigation is how you use the deduction board. Rather than waiting until you are certain about every answer, submit deductions as you make them. The board validates your answers immediately, giving you feedback that guides the rest of your investigation.

Batch Submission Strategy

Submit your easiest deductions first — the identities you are most confident about. Each correct answer gives you validation that your reasoning is sound. If a deduction is rejected, you know immediately that something is wrong, and you can focus your investigation on resolving that specific gap rather than continuing with a mistaken assumption. This iterative approach prevents you from building an entire theory on a flawed foundation.

Cross-Validating Identity and Fate

Character identities and fates are linked. If you confirm a character's identity but their fate deduction is rejected, one of your assumptions is wrong — either the identity is incorrect (even though the board accepted it), or your understanding of their fate is based on misinterpreted scenes. Use these cross-validation signals to identify and correct errors efficiently.

The Meta-Plot as a Deduction Accelerator

Once you begin solving the meta-plot, it can actually accelerate your remaining deductions. Understanding the supernatural mechanics of Galley House provides context that makes certain character fates more predictable. If the meta-plot reveals that the building preserves especially intense emotional moments, for example, you can predict which characters are most likely to have their fates tied to such moments.

FAQ

Can I complete the game in under 8 hours?

Yes, if you use a walkthrough for all codes and deductions. An independent playthrough under 8 hours is very difficult without prior knowledge of the game.

What is the fastest path to the ending?

Enter all Part 1 codes chronologically, view all Part 2 scenes as they unlock, solve the meta-plot deduction, and skip hidden scenes. This provides the core story in approximately 6-8 hours but misses achievements.

Should I use a walkthrough for efficiency?

If your goal is to complete the game quickly, yes. If your goal is to experience the investigation yourself, use hints instead of walkthroughs — hints preserve the sense of discovery while eliminating extended periods of being stuck.

How do I know when I am being inefficient?

If you are entering more than 10 codes without finding a valid scene, you are being inefficient. Switch to the keyword search tool, try character-based or location-based strategies, or request a hint.

For more tips, visit the tips and tricks guide and the beginner guide. For the official game page, visit the Steam store.