The modification continues the story of the Shooter and offers an alternative action strand. You can integrate Infiltration in the HL2-storyline but it does not start at a certain point in the known story. Complete brain control in form of an implanted chip - a direful weapon for the Combine. Nearly all human beeings in City 10 are subject already either to complete control or succumbed to the consequences of the radiation. The radiation is a product of the reactors, those secure the constant functionality of the chips. The last rebels are in a situation almost offering no prospects. Absolute control and the stop of the "normal" social life let a complete city collapse to itself. The craving for power and the control craze of the Combine are now exclusively directed...
What is that white thing in the air :O