In single-player mode, wearing a choice of rocket propelled powered armours (Light Scout, Medium Combat, Heavy Assault, or Heavy Dreadnaut), the player controls a heavily armed, male or female member of the elite CDF Marine Jump Corps and must battle insectoid aliens (occasionally referred to as "The Skulls") intent on taking over the galaxy. Gameplay is mission-based, and the player may customize their suit of powered armour with different weapons and equipment at the beginning of each mission. The player may also issue orders to a small team of computer-controlled squadmates. Weapons and gear are gradually unlocked as play progresses, like the glider-wing which attaches to the rocket pack and permits extended aerial maneuvers when it is deployed.