Yellow Tower
CommunityCommunity-sourced: based on player reports and not yet verified by this site.
The Yellow Tower is one of Big Walk's four main colored towers. Completing its five puzzles rewards the key that unlocks the tunnel system, tied to the Big Tunnel achievement.
The Yellow Tower uses the same five-puzzle structure as the other main towers. Once all five puzzles are solved, the key on the tower's roof is collected and shaped at the tower's key cutters. The shaped yellow key unlocks the tunnel system that connects areas of the island, which is what triggers the Big Tunnel achievement when a player walks into one of the big tunnels. Exact puzzle solutions for the Yellow Tower are still being documented by this site, and will be added once multiple sources confirm them.