The Green Tower unlocks the chairlift and the Big Sit achievement. The tower is around 3930, 1900, with the main chairlift lock beside it at 3950, 1950.
1. Lightbulb / Speaker Rooms — 3825, 1930
Two locked rooms show different parts of the same nine-piece board. The left room has a red signal light; the right room has a tannoy. The right player describes the missing pieces, while the left player uses repeated light flashes to identify which numbered piece is needed. Place the pieces and press the checker button.
Agree on a number code before the door closes. One flash means piece one, two flashes means piece two, and so on.
2. Crane Drop — 3790, 2250
Two switches sit on opposite sides of a coastal crane. Press them inside the short timing window. A raised lantern is a reliable signal when the two players are too far apart for a hand gesture.
3. Invisible Ink Memory — 3740, 2140
The blue building contains nine pieces whose symbols appear only through the provided lens. The door locks, so inspect and remember each piece before carrying it outside. Build a memory system using the matching statues, rocks and other visual markers outside, then place the pieces by the five-symbol board.
The board changes when the puzzle is activated again, so do not assume a previous sequence will remain valid.
4. Minesweeper — 4020, 1870
In the blue arena, activate lamps without touching the ones marked by red stars. Mark known bad lamps with lanterns or spare objects before trying again. The red-lamp layout stays put, so a failed attempt can become a map for the next one. Finish a run that activates only the safe lamps.
5. Head Count — 4100, 1880
Assign one player to each screen or lamp angle before starting. Each player counts only the black heads visible on their own view, calls out their local number, and then the team adds the totals before entering the combined number at the blue counter. Do not leave a screen unwatched or count the same moving head twice. The stuck-puzzle rescue guide has the short version to send to a teammate.
Unlock the chairlift
Return five prizes to the Green Tower panel, take the key and follow the five cutter arrows down the mountain. Insert the finished key at the chairlift station. Riding it earns Big Sit; reaching the summit afterward is part of the route for Big Climb.