E.T. the Extra-Terrestrial: Interplanetary Mission ROM Download for Playstation (PSX). E.T. the Extra-Terrestrial: Interplanetary Mission game is available to play online and download only on Roms Games. E.T. the Extra-Terrestrial: Interplanetary Mission ROM for Playstation download requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.