Hi Guys. First Tip - Don't rush the game, as you will loos important info, and miss a quest. run by everyone before you take Sid job. Even after you excepted the job from Sid, take your time before you move to Akraprom. DO THIS IN EVERY MAP YOU ENTER.
Second tip - MOLE. When you done killing of the soldiers in Akraprom, and found Mole, he take you to the entrance of the underground, get the info from him, even the phone he lot in the tunnel. Facing the building, run left around the outer side of the building back to the entrance you used to enter the stalkers base, and kill the second waver of soldiers,you need to make quick, run to the tunnel, enter it, get the phone run back the the entrance to the underground, using the outer aria as you did, and give Mole his phone. if you take your time you will loos Mole, and fail the quest of Mole phone. After that phone Quest, collect all you can, stash them, and go into the underground. You mite see two soldiers walking in the road, LEAVE THEM, you can kill them when you done with the underground quest. Now you go to the mobile home in the small swamp, get info from the soldier inside the container home, and then get to the main building to get the documents for Sid.
Third Tip - Do as Tip one before you continue to the next map, and read the text messages, or you will find later down the line, you mist out on some info on a quest. Lastly, MOST IMPORTANT, you need to keep peace with all clans/fictions, it will help you a lot, don't get a itchy finger or go trigger happy, as you will find you need some info from someone, and they wand your blood, and,you mite have killed the guy who had info for you, it will cost you a lot, you all know Sid, he loves making you do things for him, before he fix the problem for you.
Good hunting stalkers and PEACE to all.