Full list of all 51 Atomic Heart achievements.
The base game contains 42 achievements, and there is 1 DLC pack containing 9 achievements.
Fly out of Chelomey
Unlock all achievements
Kill Hedgie without making a single shot / destroy all statues
Kill Belyash
Kill Hedgie
Kill Plyusch
Kill Natasha
Kill Dewdrop
Kill Twins
Kill Belyash with a melee weapon
Get out of Vavilov
Take a train at the Lesnaya Maglev train station
Clear the VDNH complex
Finish a theater performance
Get to a hospital
Explore Pavlov
Find out the AoC's secret
Complete the game on Armageddon
Create a weapon in a crafting machine
Create five types of weapons
Collect all weapons
Craft consumables of all types
Collect 100 jelly
Pick all apples in Limbo
Upgrade a weapon to the maximum level
Fully upgrade one skill tree
Use a phone booth at Chelomey
Find all talking dead animals
Talk to every dead
Find all Chirpers
Find all Lootyagins
Find a testing ground
Complete all testing grounds
Scan all mobs
Kill 10 burning enemies, 10 electrified enemies, and 10 frozen enemies
Get 25 kills with headshots using the PM
Freeze a Vova mid-air
Don't let a sprout grow into a mutant
Use Telekinesis to throw an object and knock down an Owl
Get drunk with vodka and kill 5 enemies
Kill 3 or more enemies with a single Railgun shot
Hit 20 enemies by a car
Get into the ORB lab
Use a Strekoza for the first time
Send all BEA-Ds to NORA's brain
Complete the Annihilation Instinct DLC
Separate several combined BEA-Ds with one shot from the Secateur
Kill 3 enemies while using technostasis
Kill 3 M4D-5 robots in a row while they're hopping on one foot
Destroy 15 enemies using the Alionka neuropolymeric launch module
Upgrade the Klusha and Secateur to max