Find Oliver and convince him to help you
Finish "Power plant" quest
Earn every trophy
Reach one of the game endings
Change your memory for the first time
Finish "Old Documents" quest
Modify any weapon
Gain access to the second tier of structures in the base
Gain access to the third tier of base structures
Complete "Conspiracy" Board Investigation
Complete "Web of Lies" Board Investigation
Complete "Black Stalker" Board Investigation
Complete "Woman in Red Dress" Board Investigation
Recruit Mikhail
Finish "Traitor" quest
Finish "Weapon transport" quest
Finish "Chain Reaction" quest
Finish "Some excuses" quest
Finish "The truth about NAR's experiments" quest
Finish "Hacking into NAR servers" quest
Finish "Hermit" quest
Finish "Big Fish" quest
Finish "A memento from the past" quest
Finish "Meeting with Tarakan" quest
Recruit Olga
Finish "Hardware for real men" quest
Finish "Checkpoint assault" quest
Finish "A few things from an old hideout" quest
Finish "Hard truth" quest
Finish "Black Stalker" quest
Recruit Sashko
Recruit Tarakan
Finish "An old friend" quest
Finish "On opposite sides of the barricade" quest
Finish " Kozlov Killing" or " Kozlov Kidnaping" quest
