Invasion Orion is a 1979 science fiction strategy game written and published by Automated Simulations (who would become Epyx in 1983). It was a single- or two-player sequel to the original two-player Starfleet Orion, which had been published late in 1978. The game was originally written in BASIC for the Commodore PET and TRS-80, but later ported to other early home computer platforms including the Atari 8-bit family, and Apple II.