It Reaches Sub Level Walkthrough - Chapter 5
A focused walkthrough for Chapter 5: Sub Level in It Reaches. Covers underground machinery puzzles, dangerous backtracking, missable key items, and the transition to the final chapter.
It Reaches Guide Team
Chief Archivist
2026-07-30 (updated 2026-07-30)
7 min read
Difficulty: Very High
Verified GuideLast reviewed: 2026-07-30
Verified GuideLast reviewed: 2026-07-30Based on the current Steam version of It Reaches.
Quick Answer
Chapter 5: Sub Level is the largest and most dangerous chapter of It Reaches. You descend into underground facilities, solve multi-step machinery puzzles, backtrack with new tools, and face the most aggressive entity behavior before entering the final chapter. Save before every major sequence.
5
Chapter 5: Sub Level
Missable ContentEstimated Time
60-90 min
Difficulty
Very High
Overview
Sub Level takes you deeper into the underground facilities. This is typically the largest chapter, with multi-step machinery puzzles, backtracking, and the most aggressive entity behavior.
Objectives
- Descend into the underground facility levels.
- Solve multi-step machinery and power puzzles.
- Backtrack across previously opened areas with new tools.
- Reach the final elevator or transition to Oblivion.
Key Puzzles
The hardest puzzles in the game appear here: machinery activation, timed sequences, and key item combinations across multiple rooms. Take notes or use the in-game journal if available.
Danger Areas
- Large machinery rooms with limited hiding spots.
- Timed puzzle sections where the entity may interrupt.
- Backtracking paths that become more dangerous after story events.
Collectibles
- Underground facility documents and experiment notes.
- Final missable key items for the true ending.
- Supplies hidden behind optional side puzzles.
Tips
- Open shortcuts as early as possible to reduce future backtracking risk.
- Save before every major puzzle sequence.
- If an area is too dangerous, look for an alternate route or wait for the patrol to pass.
Chapter Summary
Chapter 5: Sub Level -- estimated 60-90 min, difficulty Very High.
Focus on Descend into the underground facility levels.. Detailed room-by-room steps are being verified against the full release and will be added as soon as possible.
What's Next
Sources & Disclaimer
Sources
- Steam store page for It Reaches (App ID 4119360)
- Official description of officer Jason Thompson and bodycam perspective
- Community-reported chapter structure from the It Reaches player hub
Last reviewed: 2026-07-30
Unofficial Fan Guide
This guide is an unofficial fan resource and is not affiliated with, endorsed by, or sponsored by Emberflight Games or Perp Games. All game names, characters, screenshots, and trademarks are property of their respective owners. Chapter structure and guide details are based on the current Steam description and community sources; exact content is being verified as the full release becomes available.
Detailed steps coming soon
We are playing through Sub Level to verify exact machinery sequences, safe routes, and missable item locations. The chapter structure above is based on the official Steam description and community-reported sources; it has not been officially confirmed by the developer.
