Gun and Frontier (World) - MAME - Arcade Shoot 'Em Up

Gun Frontier is a space Western-themed vertically scrolling shoot 'em up game. Players assume the role of planetary settlers who formed part in the colonization team of planet Gloria taking control of revolver-shaped fighter aircraft through six stages, in a last-ditch effort to defeat the Wild Lizards and free their surviving people from enslavement by the space pirates.