Stalker: Shadow of Chernobyl → X-16 Laboratory
Descend to the bottom floor via the stairs and, shooting the half-dead creatures, advance through the level. Save—in the large hall, you'll have to race up the stairs against the clock. The radiation is too powerful; your defenses won't hold up for long.
Kill the zombies as quickly as possible, then turn off the three levers on the three levels (don't miss the very first one). Once at the very top, turn right, save, and pull the lever on the control panel. Hurray, the radiation is gone, the danger is over, and a zombie career is over.
All that's left is to go into the far hall, deal with the sad controller, and loot Ghost's body. Your primary interest is the regenerative artifact suit, and only then the documents from Lab X-16. To your right is a hole in the stone floor. Be careful around the bend—a snork is hiding behind a curved piece of pipe lying against the left wall. At the fork where you kill the zombies (a grate on the left, a pile of dirt on the right), try to throw a couple of grenades over the pile of dirt with the piece of pipe lying on it—just beyond the hill, two cheerful snorks are waiting for you. They think they can catch you off guard, but no such luck!
Get ready to fire bursts at the pseudo-giant, who will knock over the crates and run toward you, but of course, he won't reach you. Run straight ahead and around the two turns, up the stairs to the surface. The helicopter won't do anything to you—it'll fire a couple of missiles at the lab and quickly fly away to be on the safe side.
The bartender unequivocally suggests you visit the Monolith and disable their psionic field, opening the way north for the stalkers. And it would seem that now that you have radiation protection, nothing (except dozens of evil Monolithists, of course) is stopping you from setting out. But don't rush. The Ghost's notes contained information about a Guide who was supposed to meet with a certain Doctor.
We'll find the first one in the south, in the Cordon area, in front of the destroyed railway bridge—the very same spot where you once spoke with Fox. The guide is laconic: "The doctor is waiting in a secret location. If you're in the know, you know where it is."
The doctor (the same old man from the visions) really doesn't want the player to start shooting at him out of fear and ruin their acquaintance, so without further ado, he'll hit the hero on the head and tell him everything while he's still suffering from a headache. And then he'll disappear, leaving behind information about a cache hidden in the Pripyat hotel, in room 26.
Let's remember this information and, armed to the teeth, head north to storm the Monolith lands. Next - Army warehouses.
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