Documents from Lab X18, part 4

 is a storyline quest item that appears in S.T.A.L.K.E.R.: Shadow of Chernobyl and S.T.A.L.K.E.R.: Lost Alpha.

"Ivan had X5, that lab under the old mines a drive south from here, deliver a pair of test subjects. We’ll try out a mix of K-7 and K-9 and see our first live reaction from human beings. But why am I still hesitant about this? We’ve been assured the subjects are a band of misfits and murders that would be far better off as test rats than perpetual prisoners. While they aren’t exactly polite, I just can’t imagine them as what we’ve been told. Ah screw it. If there’s a Hell, I would’ve already been sent there for what we’ve already done."

- PDA description

Description

 * Referred to in the player's inventory as Human testing - Dolovan K.