Alien Storm - All versions gameplay HD

Gameplay of all versions of Alien Storm (Sega 1990): (0:00) Arcade (0:45) Sega Genesis/Mega Drive (1:30) Amiga (2:17) Atari ST (3:02) Commodore 64 (3:54) Amstrad CPC (4:48) ZX Spectrum (5:32) Master System Which one did you play? Which one is your favourite?