Halley Project, The - A Mission In Our Solar System ROM Download for Amiga 500 (A500). Halley Project, The - A Mission In Our Solar System game is available to play online and download only on Roms Games. Halley Project, The - A Mission In Our Solar System ROM for Amiga 500 download requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.