The games make use of a unique "vertical cover system", as well as a standard cover system. The game includes a hover pack, and later, a jetpack, allowing for a quick transition between traditional shooter gameplay and flight. Everything unlocked in the first play through is transferred over to any new play throughs. Upgrades are purchased using Tech points through a shop at the start of every level before gameplay begins. Tech points are collected from defeated enemies and are hidden throughout the level.