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
Explore Pavlov
Get to a hospital
Use Telekinesis to throw an object and knock down an Owl
Finish a theater performance
Kill Natasha
Collect all weapons
Kill Belyash
Kill Belyash with a melee weapon
Create five types of weapons
Craft consumables of all types
Clear the VDNH complex
Kill 3 or more enemies with a single Railgun shot
Kill Plyusch
Get drunk with vodka and kill 5 enemies
Kill Hedgie without making a single shot / destroy all statues
Kill Hedgie
Find all talking dead animals
Take a train at the Lesnaya Maglev train station
Scan all mobs
Get out of Vavilov
Don't let a sprout grow into a mutant
Get 25 kills with headshots using the PM
Freeze a Vova mid-air
Upgrade a weapon to the maximum level
Fully upgrade one skill tree
Create a weapon in a crafting machine
Collect 100 jelly
Fly out of Chelomey
Use a phone booth at Chelomey
Unlock all achievements
Complete the game on Armageddon
Pick all apples in Limbo
Talk to every dead
Find all Chirpers
Find all Lootyagins
Find a testing ground
Complete all testing grounds
Kill 10 burning enemies, 10 electrified enemies, and 10 frozen enemies
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 neuropolymeric launch module
Upgrade the Klusha and Secateur to max
Collect 3,826 apples in the Trapped in Limbo DLC
Get a gold coin without shooting the Pchela
Get ALL items from the slot machine
Complete the Plateau of Responsibility without dying
Complete the Tower of Memory without dying
Complete the Cliff of Perseverance without dying
Complete the Avenue of Speed without dying
Complete the Trapped in Limbo DLC without dying
Collect 76 gold coins
Get extra 77th coin