A planned attack on Nu Earth goes wrong when a General turns traitor resulting in the massacre of Rogue's comrades. The game starts with Rogue and his comrades launched from a drop-ship. They come under fire from the Norts due to the information that had been leaked by the General. Upon landing, the first mission is a tutorial in how to use Rogue’s skills and also the Bio-chips of Gunnar and then Bagman. The third Bio-chip of Helm is received in a later mission. The Bio-chips have their own abilities. Gunnar is stuck to the side of Rogue’s rifle and can be used as a sentry while Rogue flanks the enemy. Bagman provides ammunition and upgrades for Rogue’s equipment made from salvage collected along the way, and also looks after his health. Helm is used for accessing computer consoles and panels, allowing Rogue access into prohibited areas.
Rogue works his way through the various levels as stealthily as possible, trying to take the Norts by surprise with kill moves, but with the arsenal at his disposal, he is quite capable of also unleashing hell and going toe to toe with the enemy. Tracking the traitor General, Rogue eventually catches up in the final mission with an abundance of Norts trying to stop him.
The Rogue Trooper game is available on Xbox, and it offers a variety of gameplay options. Players can work their way through levels using stealth or combat, depending on their playstyle. The game features three skill levels - Normal, Hard, and Massacre - which unlock cheats when completed. The Xbox version uses the left thumb-stick for movement, the right thumb-stick for aiming, and the right trigger/shoulder button for firing. Other buttons are used for various actions such as weapon changing or grenade throwing.
Multiplayer is available in Rogue Trooper , with four playable characters - Rogue, Helm, Gunnar, and Bagman - each with their own attributes. There are five arenas to choose from, with objectives such as defending for a certain amount of time against waves of Norts or getting to an objective point. High scores will be saved with the user's profile.