One of the more perplexing obstacles in Big Walk is the puzzle marked by the coordinates 4166, 1899. Players will encounter a box containing a puzzle MacGuffin, accompanied only by a plank displaying these numbers, leaving many to question the next steps. The solution hinges on understanding these numbers as geographical coordinates.
To effectively use these coordinates, players are advised to first complete the red tower. This involves placing five MacGuffins into its console, which in turn unlocks a shaped key. This key is then used to open a room adjacent to the session spawn point, which some players have referred to as a gym. Inside this room, a large 3D map of the island is displayed on the floor, detailing the locations of all MacGuffins and other landmarks. While this map is visually helpful, it lacks coordinate markings.
However, a paper map found on a table within the same room provides the necessary grid. Upon opening this map, players will observe latitude and longitude lines plotted along its edges. Locating the rough area for 4166, 1899 on this paper map is the next step. For those struggling to pinpoint the exact spot, visual aids are available to guide players to the precise location, marked by a red circle on the map.
Upon reaching the designated coordinates, players will find a camouflaged button on the side of some rocks. It is imperative that at least one player remains at the initial location with the locked MacGuffin while another player proceeds to press this button. The area to target is situated in the south-central part of the map, between the railway's curve and where a ski lift enters a tunnel.
Once the button is pressed, the box containing the MacGuffin at the starting location will unlock, allowing the second player to retrieve it and complete the puzzle. This marks the successful resolution of the 4166, 1899 puzzle.