OpenTyrian is a port of the DOS shoot-em-up Tyrian. Tyrian is an arcade-style vertical scrolling shooter. The story is set in 20,031 where you play as Trent Hawkins, a skilled fighter-pilot employed to fight Microsol and save the galaxy. This port is done by ZX-81.

Changes:

I’ve added a new render mode to fit the Pandora screen in version v1.1

http://zx81.zx81.free.fr/serendipity/index.php?/archives/432-Pandora-OpenTyrian-OpenTyrian-ported-to-Pandora-v1.1-update.html