In September 2021, the game as well as other Pangea software titles received a free, open source re-release for Windows, modern macOS, and Linux.

Levels typically begin with Otto landing his rocket ship on a planet controlled by the Brain Aliens.

The level design tends towards the whimsical: enemies include enormous walking vegetables, clowns, and miniature robotic wrecking balls, and the landscapes are usually cartoonish and warped.

Otto Matic takes place in the year 1957, as the Earth is being conquered by the evil Brain Aliens from Planet X.

The player takes on the role of Otto Matic, one of a line of robots charged with policing the galaxy, as he attempts to defeat the Brain Aliens and restore the independence of the Earth.