It Reaches The Sewer Hideout Walkthrough - Chapter 4 Guide
The Sewer Hideout chapter walkthrough for It Reaches: William Blake's Hideout, multi-step puzzles, remaining family collectibles, DanQ8000 timestamps, and progression to The Organism.
It Reaches Guide Team
Chief Archivist
2026-07-30 (updated 2026-07-31)
5 min read
Difficulty: High
Verified GuideLast reviewed: 2026-07-31
Verified GuideLast reviewed: 2026-07-31Based on the current Steam version of It Reaches.
Quick Answer
The Sewer Hideout chapter leads to William Blake's Hideout and earns the Science and History achievement. It contains the final family collectibles, harder puzzles, and the transition to the final chapter, The Organism.
4
Chapter 4: The Sewer Hideout
Missable ContentEstimated Time
70-90 min
Difficulty
High
Overview
The Sewer Hideout is the late-game chapter where the story converges. Based on DanQ8000's chapter markers, this chapter runs from approximately 2:52:55 to 4:09:41. You reach William Blake's Hideout, collect the final family items, and unlock the path to The Organism.
Objectives
- Reach William Blake's Hideout and earn the Science and History achievement.
- Collect the remaining family collectibles tied to achievements.
- Solve the chapter's hardest environmental puzzles.
- Reach the transition point to The Organism.
Key Puzzles
Expect the game's most complex environmental puzzles in this chapter, possibly including the cage lock and code door referenced by players. Exact solutions are being verified against walkthrough footage.
Danger Areas
- William Blake's Hideout and surrounding areas with concentrated enemy threats.
- Tight spaces where the entity and Venus Hand Traps are active.
- Backtracking paths needed to collect missable items.
Collectibles
- Toy Carousel tied to Round and round we go.
- Son's family drawing tied to In good hands.
- Worn Football tied to A great team!
- Last documents and lore items before the ending.
Tips
- Save before entering The Organism; this is likely the point of no return.
- Check every room in the hideout before progressing -- several achievements depend on it.
- If you are missing collectibles, backtrack before the final transition.
Chapter Summary
Chapter 4: The Sewer Hideout -- estimated 70-90 min, difficulty High.
Focus on Reach William Blake's Hideout and earn the Science and History achievement.. 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)
- DanQ8000 full gameplay walkthrough chapter timestamps
- wolker4 100% walkthrough collectible timestamps
- Steam Community global achievement statistics
Last reviewed: 2026-07-31
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 verifying exact collectible placements, puzzle solutions, and safe routes against full-game walkthrough footage. The chapter structure above is based on official chapter markers from community walkthroughs.
