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...
In the city are not living citizens any longer but
zombies. (feel free to correct my english if
it's wrong, im from germany :))