Skyborg: Into the Vortex (1995)

Players assume the role of Skyborg, a cyborg in the year 2025, on a dangerously overpopulated Earth low on food. Dr. Sinclair Barton has created a torus-shaped pocket universe to alleviate this problem. You must enter this universe and travel from planet to planet gathering clues to figure out what has gone wrong and where Dr. Barton is.