Tyson Rios is one of the two main protagonists of the Army of Two series; he originally worked for SSC with his long time partner Elliot Salem until the two decided to leave and form their own private military firm called TWO (Tactical Worldwide Operations). However Rios' life of combat eventually came to a tragic end when his left leg was badly damaged due to a car explosion and the presumed death of Salem. Unable to continue to work in the field; Rios commands TWO operatives as an executive.