Planet Harriers is a 3D science fiction themed shoot 'em up played from an first or third person perspective. Diplomacy has failed and the forces of evil have invaded a planet. You now take on the role of a Hyper Soldier from earth to save it.
The four Hyper Soldier to choose from are Glenn, Cory, Nick and X, each with their own weapons. While playing you fight a variety of strange alien creatures, spacecrafts and bosses. Most of the time you fly in the air but at some parts you can run on the ground using your legs. Along the way money and med kids (to restore health) can be collected. At the end of each stage weapon and health upgrades can be bought from the collected money. The game has a total of five stages and can be played solo or with a friend on a linked cabinet.