Light hint
The Green Tower works like the other colored receivers: collect five nearby puzzle rewards, return them to the tower, then do not stop when the blank key appears.
Useful nearby clues
Published walkthroughs identify an Orange Barn challenge, the 4166/1899 coordinate puzzle, a Blue Signal challenge, a Yellow Stand and a paired Beach House task. They can be completed in a flexible order.
Full activation route
Reveal the chairlift unlock
Place five rewards at the Green Tower and take the released key.
Carry it through all five key cutters, following the direction shown after each cut.
Use the finished key at the chairlift control. Movement confirms the lift is active, making the Blue, Yellow and Black Tower regions easier to reach.
