Full list of all 82 Atomic Heart achievements. It takes around 40-50 hours to unlock all of the achievements in the base game on Windows.
The base game contains 42 achievements, and there are 4 DLC packs containing 40 achievements.
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
While standing by the window, listen to a chirper narrating the story of the mysterious tune
Find all the Hunter's stashes
Destroy the Robogirl at Chelomey
Complete the story DLC
Toss the ball back and forth with the dolphin three times
Pull yourself close to your enemy with the Whip
Talk to Terentiy
Swim beyond the underwater world's borders, ignoring warnings