Train route · Sources checked August 26, 2026
Big Walk Blue Tower Puzzle Guide
The Blue Tower powers the island railway. Its nearby challenges reward short, literal communication and clean role assignments.
Direct answer
Fill the Blue Tower, cut the key and use it at the station
Collect five red prizes, place them in the Blue Tower rooftop cases and take the blank key. Follow the arrow-linked cutters down the mountain, then insert the completed key at the nearby train-station lock to start the railway.

Before you start
- Cross the opening drawbridge and identify the Blue Tower or its map coordinate.
- Bring five prizes from completed island puzzles; community routes do not require one exact set.
- Agree on simple symbol, movement and timer callouts before entering locked rooms.
Step-by-step
- 1
Turnstile symbol rooms
One room sees a five-symbol sequence. Describe it left to right so the other room can place the matching pieces and check the panel.
- 2
Five-minute room
Start the countdown and deliberately wait. Pressing controls to test them can reset the patience challenge.
- 3
Co-op obstacle course
Use a teammate as a step, hold doors for the group, clear the low and high obstacles, then pass the timed piece to the far holder.
- 4
Blind route
One player takes the vision-limiting item while an outside guide uses short commands such as forward, jump, crouch and stop.
- 5
Charades sequence
The locked player performs the displayed action sequence. The outside player chooses matching action pieces in order.
- 6
Start the trains
Place five prizes at the tower, cut the key through the full arrow chain and use it at the station lock.
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.



Still stuck?
- Do not interrupt the five-minute countdown; waiting is the intended action.
- For symbol or charades rooms, record the sequence from left to right before anyone moves pieces.
- For the blind course, use one instruction at a time and wait for confirmation before the next move.
- If the trains remain still, verify the key was used at the station rather than returned to the tower.
Spoiler and verification boundary
What is verified on this page
This page reveals the railway unlock but not late-game destinations.
The five nearby challenges and cutter route are community-tested. Their descriptive names and approximate coordinates may differ from how players label them.