One version is common, at least one other version is rare
Original release protected by dongle. According to Hervé Lange and Olivier cordoleani, BAT II is a 64 colors game. Hervé was basically changing the full 32 colors palette mid-screen. The game is 100% coded in 68000 ASM. Olivier also explained that the 3D was 2 times faster on the Amiga than on the Atari ST version.