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