Classified data

A Duty commander hid a document he got from the raid in X-18, shortly before his death in a fight with the military. Voronin wants Marked One to find it, based on his last words: "the place where you can always get a chemical burn", i.e., a Burnt Fuzz anomaly.
After accepting this quest, Sidorovich will warn everyone over the radio that three controllers zombified the entire Cordon checkpoint and led them somewhere towards Dark Valley.
== Walkthrough ==
The approximate location of the case will be shown on your map; it's the [ factory] in Dark Valley. The case itself is hidden within the tower crane.
After picking up the case up and exiting the factory through the main gate and T-junction, the three controllers Sidorovich mentioned will appear around Marked One, with the military they zombified, and a pseudogiant. The best strategy to deal with them seems to be just sprint towards the Dump to escape their combined sphere of influence, smoke a Cigar and snipe everyone from afar, then kill the pseudogiant up close.
Report to Voronin for your reward.
== Notes ==
* While you can avoid the controllers encounter through other routes, the restrictor on the junction will remain here until you deal with them.
* The transition is valuable, as it proves an early game path to Radar and skipping a massive fight if you come from the Army Warehouses, although you will need to fight some Monolith guarding the transition to Dark Valley from Radar
== Bugs ==