Finish "A memento from the past" quest

Finish "Hard truth" quest

Gain access to the second tier of structures in the base

Finish "Hermit" quest

Modify any weapon

Reach one of the game endings

Finish "A few things from an old hideout" quest

Complete "Woman in Red Dress" Board Investigation

Recruit Olga

Finish "Big Fish" quest

Finish "On opposite sides of the barricade" quest

Complete "Web of Lies" Board Investigation

Finish "Power plant" quest

Finish "Hacking into NAR servers" quest

Finish "Hardware for real men" quest

Finish "Black Stalker" quest

Change your memory for the first time

Earn every trophy

Recruit Sashko

Finish "Kozlov Killing" or " Kozlov Kidnapping" quest

Complete "Conspiracy" Board Investigation

Finish "Checkpoint assault" quest

Finish "Traitor" quest

Complete "Black Stalker" Board Investigation

Finish "Weapon transport" quest

Recruit Tarakan

Finish "Chain Reaction" quest

Gain access to the third tier of base structures

Finish "Some excuses" quest

Recruit Mikhail

Find Oliver and convince him to help you

Finish "Old Documents" quest

Finish "The truth about NAR's experiments" quest

Finish "Meeting with Tarakan" quest

Finish "An old friend" quest