Xenon is a vertical scrolling shooter, created by The Bitmap Brothers initially for the Atari ST in 1988 and ported to Amiga, ZX Spectrum, and MSX the same year. The game is the prequel to the much more popular Xenon 2: Megablast. Unlike other vertical shooters, the tank controlled by the player can move in all directions. The tank can also be transformed into a plane, so that it can destroy enemies mounted on hills.
Xenon was the first game that was able to show the gaming capabilities of 16-bit computers and opened a golden age for Atari ST and Amiga games.