Alida (2004)

Alida is a guitar-shaped island off the Australian coast, built by members of a musical group who became extremely rich after selling enough copies of their first album.

When no second album was produced, they were largely forgotten by their fans. The band split up, with each member taking a separate area on the island and hoarding their remaining money in elaborately locked vaults. In time, all of the members left Alida.

Arin, one of the members, went to the island for a supposed reunion but never returned. His wife asks you to go to Alida and find him.

You play in first-person, in Myst-like solitude, and explore the entire island to learn what happened to the band and find Arin. The puzzles vary in difficulty and are mostly musical in nature.