Big Walk Guide
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LOCKEDFinish the Yellow source requirement.CheckMap

Big Walk Tunnels Guide

Unlock the tunnel network through the Yellow route, find its entrances and get Big Tunnel.

  • 🔑 Yellow route destination
  • 🕳 Underground network
  • ↕ 4 colored access points
  • 🏆 Big Tunnel achievement

Check My Tunnel AccessShow Tunnels on Map

Tunnel Access Status

  • Yellow Key released
  • Key cutters
  • Finished key placed
  • Tunnel network open

NEXT

Finish the Yellow source requirement.

Your tunnel state is saved on this device and shared with the Yellow route and 100% tracker.

Tunnel Access Status

These four checks name the one thing still standing between you and the tunnel network.

  • Has the Yellow Key been released?Not yet

  • Have all five Yellow cutters been completed?0 / 5

Tap the placed key or the open network once you have done it. Progress is saved on this device and shared with the rest of the site.

NEXT

Finish the Yellow source requirement.

The Yellow Key has not been released yet. Tunnel access belongs to the Yellow route, so the source has to hand the key over first.

Your next action

Release the Yellow Key.

Yellow Area GuideBig Key Guide

Why Are the Tunnels Still Closed?

Work down this list. Each row is one Yellow-route state, not a generic “finish earlier transport first” step.

  • Yellow source incomplete

    Your next action

    The Yellow Key has not been released from its source.

    Finish the Yellow source requirement.

  • A Yellow cutter is still missing

    Your next action

    The released key has not passed every cutter yet.

    Go to the first incomplete Yellow cutter.

  • The Yellow Key is still unfinished

    Your next action

    Five cutters are required before the key is in its finished state.

    Complete the remaining Yellow cutters.

  • The finished key has not been placed

    Your next action

    All five cutters are done, but the finished key has not reached the tunnel destination.

    Take the finished Yellow Key to the tunnel destination.

  • Key placed, gates still closed

    Your next action

    The Yellow route is finished, so this is not a route problem any more.

    Check the four colored access gates in game and use the one that opens.

How to Unlock the Tunnels

The unlock is the Yellow Big Key route, end to end. In order:

  1. 1

    Release the Yellow Key.

  2. 2

    Complete all five cutters.

    Yellow Cutter 1Yellow Cutter 2Yellow Cutter 3Yellow Cutter 4Yellow Cutter 5

  3. 3

    Take the finished key to the tunnel destination.

  4. 4

    Open the tunnel network.

Releasing the Yellow Key is only the beginning. Nearby Yellow puzzles are not a substitute for the five cutters or the destination.

Check My Tunnel AccessYellow Area Guide

Where Are the Tunnel Entrances?

The Yellow route has the activation destination, but once the network opens there are several colored access points around the island.

  • Yellow unlock point

    The finished Yellow Key goes to this one destination. Opening it is not the same thing as the underground network it switches on.

  • Colored access points

    Four verified gates — red, green, blue and yellow. Once the network is open, the same gate works as an entrance or an exit.

Show All Tunnel Access Points

Tunnel Network

One transport system with four colored access gates. Where each gate leads underground is not published as a route order.

Where Does Each Tunnel Go?

Pick a gate to see what is verified for it. The color of a tunnel does not prove which area it leads to, so no destination is guessed from the color alone.

Tunnel Network

This is a schematic of the four verified gates, not a map of the underground geometry. No unverified corridors are drawn.

Colored tunnel gate

紅色通道入口

Status

Locked

Map position

Marked on the world map

Underground route

Not published yet.

Show on World Map

Show All Access Points

How to Use the Tunnels

  1. 1Unlock the Yellow route.
  2. 2Enter an opened tunnel entrance.
  3. 3Follow the in-game route and signage through the network.
  4. 4Exit through an available access point.

Community guides recommend using a flashlight because the tunnels are dark. Treat that as a tip rather than a requirement.

What Do the Tunnels Do?

They give your group an underground route between several parts of the island.

The tunnels are a transport system of their own, not a faster version of the Train or the Chairlift, and not a late-game gate unless a later dependency is verified.

Tunnels, Train and Chairlift

Each transport is opened by its own Big Key route. The full comparison lives on the Transport hub.

Big Tunnel Achievement

Opening the tunnel network is not the achievement. Once the network is open, actually enter one of its tunnel entrances.

🏆 Requirement

進入一條大通道。

Standing at the mouth of the tunnel is not entering it. The full trigger, the entrances that count and the fixes live on the achievement page.

Full Big Tunnel Achievement GuideShow Big Tunnel Location

Big Tunnel or Train Tunnel?

  • Big Tunnel

    The underground network the Yellow route opens. Walking into it is what fires the medal.

  • Railway tunnel

    Part of the Train route. Riding the Train through it is a different system and does not fire Big Tunnel.

Open the Train Guide

Secrets Inside the Tunnels

Shiny Makeover Room

The makeover room with the metallic finishes sits inside the tunnel network. The full route, the paint choices and the achievement checks belong to the Big Makeover guide.

Get Shiny Guide

What Should I Do After Unlocking Tunnels?

Yellow being complete does not pick the next route for you. Use your current progress to see which unfinished route actually matters.

What Should I Do Next?Unfinished Red, Green or Blue, the Black Tower, or later progression only appear when that dependency is true for you.

Tunnel FAQ

我該如何解鎖通道？

完成黃色 Big Key 路線：釋放鑰匙，讓它通過全部五台切割機，然後把成品鑰匙放到通道目的地。

我需要先做火車嗎？

不要預設存在固定的火車→纜車→通道順序。通道網路屬於黃色路線。

我通關了黃塔，為什麼通道還是鎖著？

釋放黃鑰匙只是開始。請完成全部五台切割機，並把成品鑰匙放到通道目的地。 黃色區域指南

通道入口有幾個？

已查證四個彩色入口：紅、綠、藍、黃。每一個都既可以當入口，也可以當出口。 入口詳情

紅、綠、藍、黃色的通道分別通向哪裡？

只有在某個入口的目的地得到查證時才會顯示。入口的顏色不被視為它通向何處的證據。 入口詳情

我怎樣獲得「大通道」？

進入一條開啟的大通道。官方要求很簡單：進入一條大通道。 大通道

打開通道會自動解鎖「大通道」嗎？

不會。解鎖網路並不是觸發條件——你必須真正走進一條大通道內部。站在入口處不算。 大通道部分

火車隧道是同一回事嗎？

不是。鐵路隧道屬於火車路線。「大通道」指的是黃色路線所開啟的地下網路。 火車攻略

閃亮的換裝房間在通道裡面嗎？

換裝房間就在通道網路裡面，但它的路線、塗裝選擇和成就檢查都歸「大變身」攻略負責。 Big Makeover 攻略

結局需要通道嗎？

除非查證了具體的後期依賴關係，否則應把交通網路和結局進度視為彼此獨立的系統。 我接下來該做什麼？

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