Xenon is a 1988 vertical scrolling shooter video game, the first developed by The Bitmap Brothers, and published by Melbourne House which was then owned by Mastertronic. It was featured as a play-by-phone game on the Saturday-morning kids' show Get Fresh.

According to the game's instruction manual, the player assumes the role of Darrian, a future space pilot in the Federation, currently at war with a mysterious and violent alien species called the Xenites that has lasted a decade. In response to a mayday transmission from Captain Xod following an attack on his trading fleet, Darrian is forced to travel through Xenite-occupied territory in order to support.

Unlike most vertically scrolling shooters, the player craft has two modes, a flying plane and a ground tank. The transition between crafts can be initiated at almost any time during play (except during the mid- and end-of-level boss sections, as well as certain levels where a certain mode is forced), and the mode chosen depends on the nature of the threat the player faces. Destroying some enemies released power-ups the player could catch to enhance their ship.