Full list of all 61 Atomic Heart achievements.
The base game contains 42 achievements, and there are 2 DLC packs containing 19 achievements.
Kill Twins
Find out the AoC's secret
Kill Dewdrop
Complete all testing grounds
Find all Lootyagins
Craft consumables of all types
Find a testing ground
Explore Pavlov
Kill 10 burning enemies, 10 electrified enemies, and 10 frozen enemies
Get to a hospital
Upgrade a weapon to the maximum level
Finish a theater performance
Kill Natasha
Pick all apples in Limbo
Get drunk with vodka and kill 5 enemies
Kill Belyash
Get 25 kills with headshots using the PM
Hit 20 enemies by a car
Collect all weapons
Scan all mobs
Find all talking dead animals
Clear the VDNH complex
Fully upgrade one skill tree
Kill Plyusch
Don't let a sprout grow into a mutant
Kill 3 or more enemies with a single Railgun shot
Create five types of weapons
Kill Hedgie
Take a train at the Lesnaya Maglev train station
Get out of Vavilov
Collect 100 jelly
Create a weapon in a crafting machine
Fly out of Chelomey
Unlock all achievements
Kill Hedgie without making a single shot / destroy all statues
Kill Belyash with a melee weapon
Complete the game on Armageddon
Use a phone booth at Chelomey
Talk to every dead
Find all Chirpers
Freeze a Vova mid-air
Use Telekinesis to throw an object and knock down an Owl
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