The borrowed knife achievement in "Stalker 2: Heart of Chernobyl" is a relatively unique side mission achievement in the game. If you want to do this achievement, you can complete the side mission "The Unkind One" and then go to the location "Magnetic Cave" , after exiting the cave, you will find two guards attacking the big dog.
How to achieve the achievement of Killing with a Knife in STALKER 2: Heart of Chernobyl
To kill someone with a borrowed knife, go to the location "Magnetic Cave" after completing the branch "The Unkind One". After exiting the cave, you will find two guards attacking Dagouzi, and lead Dagouzi into the flame vent of the magnetic cave to solve the problem.
