Big Walk Field Guide Co-op routes, puzzles, crossplay and platforms

Tunnel route · Sources checked August 26, 2026

Big Walk Yellow Tower Puzzle Guide

The Yellow Tower opens the underground network. Its nearby route is communication-heavy, so agree on short sound and position callouts first.

CommunityBig Walk 1.5.1Direct answer

Direct answer

Submit five prizes, cut the Yellow key and open the tunnel

Collect five red prizes from suitable puzzles, place them in the Yellow Tower panel and take the blank key. Follow every cutter arrow until the key is fully shaped, then use it at the Yellow Tunnel entrance.

A high view across the island from the Yellow Tower route
Yellow Tower route landmark from the authorized Screen Hype tunnel walkthrough

Before you start

  • Bring radios or another agreed signal method for separated sound puzzles.
  • Do the search-heavy challenge in daylight when possible.
  • Leave one backpack slot or hand free for the tower key.

Step-by-step

  1. 1

    Colored-piece search

    Sweep the entire arena by color and region, including trees, rocks, rails and side passages. Stage each color together before filling the wheel.

  2. 2

    Microphone test

    One player listens from the chair while teammates test microphones in order. The listener signals which source is audible or strongest.

  3. 3

    Sound matching room

    The locked player reproduces the heard rhythm over the intercom. The outside player matches it to the correct speaker.

  4. 4

    Mirrored stage controls

    The inside player calls the lit position. The outside player converts it to the mirrored panel position before pressing.

  5. 5

    Aerial seat relay

    One player reads the board sequence while another transports matching pieces across the moving seat. A backpack reduces repeated trips.

  6. 6

    Open the tunnels

    Submit five prizes, follow the full cutter chain and use the finished key at the tunnel entrance.

Visual route

Match the landmark before you move

Authorized gameplay screenshots and route videos are paired with text so the guide still works without media.

Screenshots retain the original game text; videos retain their original audio. Use the captions and written checkpoints alongside them.

The starting landmark for the Yellow Tower Easter Egg Hunt
Easter Egg Hunt: agree on one search sector and return found objects to the same staging point.
The headphones and microphone setup in the Sound Check puzzle
Sound Check: use a clear signal so the seated player can identify the live microphone.
A player using the megaphone in the Yellow Tower Music Room
Music Room: keep one caller on the megaphone and repeat the current pattern in short chunks.

Video route · MonkeyKingHero

How to enter a big tunnel in Big Walk

Tunnel entrance and Yellow Tower route.

Shows the tunnel entrance and route, but no ending events.

Watch on YouTube

Video chapters and text alternative

  1. 1
    Find the entrance

    Match the exterior landmark before following the underground route.

  2. 2
    Confirm the unlock

    If the entrance is still closed, return to the Yellow Tower key route.

Still stuck?

  • For missing colored pieces, assign one player per region instead of repeating the same front-facing search.
  • For sound puzzles, use objective descriptions such as pitch, count and rhythm rather than private nicknames.
  • For mirrored controls, write the conversion down before starting the timed interaction.
  • If the tunnel stays locked, return to the last key cutter shown by the previous arrow.

Spoiler and verification boundary

What is verified on this page

This page reveals the tunnel unlock. Underground achievements and post-game routes are handled on separate spoiler-marked pages.

The puzzle set and role instructions are community-documented. Exact coordinates and optional substitutes are not presented as official requirements.

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