Virus 60Hz Version (Amiga - David Braben) Batocera 40 (60Hz)

Zarch (also known by its ported name Virus) is a computer game developed by David Braben (better known as co-author of Elite) in 1987 for the release of Acorn Archimedes. Zarch began as a demo called Lander that shipped with almost all versions of the Acorn Archimedes.

In 1988, Zarch (under the new name Virus) was ported to the Atari ST, Amiga (programmed by David Braben) and IBM PC (programmed by Chris Sawyer). It was later ported to the ZX Spectrum by Steven Dunn.