Gun Frontier Arcade Gears

Gun Frontier is a 1991 vertically scrolling shooter video game developed and published by Taito for arcades. It was only released in Japan. It is set on the fictional planet of Gloria in the 22nd century, where an alien race of space pirates known as the Wild Lizards have invaded the planet and enslaved its inhabitants for gold extraction. Players assume the role of settlers who were part of the planet's colonization team, taking control of revolver-shaped fighter aircraft in an attempt to overthrow the invaders and free their surviving civilization from slavery.