Go to Blue Tower, complete nearby challenges for their rewards, place the required rewards at the tower and collect the key that unlocks the train system.
01 · Steps
Train unlock steps
What to know
Blue Tower is the hub for this route. Treat the commonly suggested five nearby puzzles as an efficient route, not as the only fixed set permanently tied to the tower.
- Reach Blue Tower and inspect its reward placements
- Complete suitable nearby puzzles with your group
- Return and place the puzzle rewards
- Collect the released key
- Use the key to unlock the train system
02 · Guide notes
Before you leave Blue Tower
What to know
Confirm that every player understands which station or landmark you are using next. The train makes repeat travel easier, but it does not replace the need to communicate at puzzle sites.
What this guide does not claim
Community labels are not presented as official names. Approximate coordinates stay marked as approximate, version-sensitive facts need a publication-day check, and no unsupported platform, code, solo route or mod-only shortcut is invented.
Source trail
Sources used for this page
ScreenHype train guideBlue Tower, nearby route, reward placement, key and train unlock evidence. External website · opens in a new tab.Quick checks
Frequently asked questions
What is the direct answer?
Go to Blue Tower, complete nearby challenges for their rewards, place the required rewards at the tower and collect the key that unlocks the train system.
How current is this information?
The source pack was reviewed on August 17, 2026. Platform status, prices, versions and live service information must be checked again on the publication date.
Are community puzzle names official?
Not necessarily. Big Walk does not provide an official name for every challenge, so this site identifies player-made labels whenever that distinction matters.