FRACT OSC (Phosfiend Systems)
"FRACT is a musical exploration game. You arrive in a forgotten place and explore the unfamiliar landscape to discover the secrets of an abandoned world that was once built on sound. As you start to make sense of this strange new environment, you work to rebuild its machinery by solving puzzles and bring the world back to life by shaping sound and creating music in the game." - Author's description
Purchase on the Humble Store for $13.49 (Windows, Mac)
Purchase on Steam for $13.49 (Windows, Mac)
Purchase on GOG.com for $13.49 (Windows, Mac)