It is an action shooter set in a futuristic dystopian city on Earth overthrown by aliens. The game has two modes - third person and first person. Most of the time the player sees the character in third person, however the player can also see through the character´s eyes and shoot. However, the player cannot move the character while in the first person. The game is mission-based and it is strictly linear. The main enemies are aliens and cyborgs.

The population is threatened with near extinction as hostile alien forces ravage the planet, converting human survivors into cyborg warriors. Working against all odds and armed with an Alien Imaging Unit that has replaced his left eye, Resistance fighter Lt. Riley Vaghan must use firepower, stealth, intelligence and sheer determination to save humankind from impeding doom.