Lost mountain is in a fishing village by the sea, and the task can be received at the door of a family here. According to the mission information, the answer to unlocking is on their boat. Haerty Grice (1), PAPI(2), Lucky (3), Clarita (4), Roja (5). All five buttons are in the room, with huge wooden boards of different colors beside them. As long as you enter this room while playing, you won't miss these boards.