Atomic Heart has a total of 42 Trophies (1 Platinum, 3 Gold, 8 Silver, 30 Bronze). Below you can find the full Atomic Heart trophy list.
Atomic Heart Trophies
The Motherland Does Not Forget its Heroes 
Unlock all trophies
Strike 
Kill Hedgie without making a single shot / destroy all statues
Medium Rare 
Kill Belyash
Make It Go Round
Kill Hedgie
Plyusch Rush
Kill Plyusch
Show’s Over
Kill Natasha
Dew Point
Kill Dewdrop
Murderous Beauty
Kill Twins
Chop Chop Chop
Kill Belyash with a melee weapon
Happy Polymerization Day!
Fly out of Chelomey
Pistils and Stamens
Get out of Vavilov
Tickets, Please!
Take a train at the Lesnaya Maglev train station
Quite an Achievement
Clear the VDNH complex
Curtain
Finish a theater performance
Medical Checkup
Get to a hospital
Freedom Reflex
Explore Pavlov
Kommunism 2.0
Find out the AoC’s secret
Atomic Heart 
Complete the game in Hardcore mode
Artisan
Create a weapon in a crafting machine
Weapon Master
Create five types of weapons
Lord of War
Collect all weapons
Chemist
Craft consumables of all types
Polymerization
Collect 100 jelly
Apple Pie
Pick all apples in Limbo
The Great Inventor
Upgrade a weapon to the maximum level
Lefthand Mastery
Fully upgrade one skill tree
How Can I Help You?
Use a phone booth at Chelomey
Beast Friend
Find all talking dead animals
The Necromancer
Talk to every dead
Burning Ears
Find all Chirpers
More Than Profit
Find all Lootyagins
Explorer
Find a testing ground
Clean-up
Complete all testing grounds
Scanner
Scan all mobs
Avatar
Kill 10 burning enemies, 10 electrified enemies, and 10 frozen enemies
Hothead
Make 25 aimed headshots from Makarov pistol
Below Zero
Freeze a Vova mid-air
Assimilation Procedure Interrupted
Don’t let a sprout grow into a mutant
Bull’s Eye!
Use Telekinesis to throw an object and knock down an Owl
Alcoholics Anonymous
Get drunk with vodka and kill 5 enemies
Triple Penetration
Kill 3 or more enemies with a single Railgun shot
Hands on the Hood
Hit 20 enemies by a car
There is a trophy for beating the highest difficulty ‘hardcore’. Some of the boss trophies sound like they could be missable (depends on whether there is chapter select or not): killing Hedgie without making a single shot / destroy all statues & killing Belyash with a melee weapon We must also find all collectibles which include: all weapons, 100 jelly, all talking dead animals, talk to all deads, all Chirpers, all Lootyagins, all Testing Grounds.
Basically, we need 100% completion for the platinum. How difficult it will be depends entirely on hardcore difficulty, the rest shouldn’t be too difficult.
What are your thoughts on the Atomic Heart trophy list? Do you like what you see? Are you going for the Platinum?
Update: Platinum is obtainable only as of Patch 1.4.0.0 (released April 06, 2023). Make sure you have the latest patch installed before playing.