The game opens up at a ruined city as a Resistance dropship drops off Lieutenant Riley Vaughan to locate an attacked outpost and a missing recon team. He does this with relative ease, finding the outposts wounded soldiers and the recon team. The recon team gives him a detonator and the outpost soldiers give him some explosives. He uses the explosives to clear away a roadblock however the explosion set something off and he continues along his path. During his mission he is periodically updated by Colonel Grisham and Doctor Carter, before the mission Dr. Carter installed an alien optical implant connected to an imaging unit in Vaughan that has the ability to detect enemies and give information about them.