Silent Marksman

Silent Marksman is an achievement in Metro Exodus.

Overview
The achievement is obtained for killing 30 enemies using the Tikhar pneumatic rifle. This weapon is given to Artyom by Tokarev at the beginning of The Volga. It has fairly low damage per shot and has to be regularly pumped so that the damage doesn't drop even further, but it is very silent, compared to firearms that use combustion ammunition. Therefore, the best way to get this achievement is to perform headshots with fully-pumped Tikhar while remaininbg undetected. This will usually kill the enemy with a single shot.