OpenTyrian is described as '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' and is an game in the games category. There are seven games similar to OpenTyrian for a variety of platforms, including Windows, Linux, Mac, iPhone and iPad. The best alternative is AstroMenace, which is free. Other OpenTyrian like games are Kartoffelpüree, Chromium B.S.U., Echoes+ and Space Shooter.
Chromium B.S.U. is a fast paced, arcade-style, top-scrolling space shooter on Windows, iPhone, PSP, Mac, AmigaOS 4, Linux and numerous other UNIX-like operating systems. It is a free software distributed under the Artistic License.
Space Shooter Evolution is a tactical original arcade-style top-down shooter experience shoot'em up. Progress through unique and challenging randomized space alien battle scenes and shoot your way through masses of enemies in this epic.
Space Grub offers an endless arcade shooter experience with quirky visuals that add tons of fun. Play as 17 different ships and collect power-ups as you travel through space exploding your favorite Chinese foods.