Here is the full list of all 35 Chernobylite achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Earn every trophy
Reach one of the game endings
Finish "Hard truth" quest
Complete "Woman in Red Dress" Board Investigation
Complete "Black Stalker" Board Investigation
Finish "Black Stalker" quest
Finish " Kozlov Killing" or " Kozlov Kidnaping" quest
Finish "The truth about NAR's experiments" quest
Finish "On opposite sides of the barricade" quest
Recruit Olga
Finish "Big Fish" quest
Finish "Weapon transport" quest
Finish "Some excuses" quest
Complete "Web of Lies" Board Investigation
Finish "Chain Reaction" quest
Finish "An old friend" quest
Finish "Checkpoint assault" quest
Recruit Tarakan
Finish "A few things from an old hideout" quest
Finish "Hermit" quest
Finish "Hardware for real men" quest
Finish "Old Documents" quest
Change your memory for the first time
Recruit Sashko
Complete "Conspiracy" Board Investigation
Finish "Meeting with Tarakan" quest
Recruit Mikhail
Finish "Hacking into NAR servers" quest
Gain access to the third tier of base structures
Finish "Traitor" quest
Gain access to the second tier of structures in the base
Finish "A memento from the past" quest
Modify any weapon
Find Oliver and convince him to help you
Finish "Power plant" quest