Here is the full list of all 50 ELEX achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Cold is 10 or lower.
Sided against the Hybrid.
Cracked 50 safes
Picked 100 locks.
Fed Mana to the Hybrid.
Learned all Berserker skills.
Learned all dexterity skills.
Learned all character skills.
Learned all survival skills.
Learned all fighting skills.
Modified weapons 20 times
Collected 20 pictures.
Found Calaan
Completed ELEX.
Served the Hybrid.
Completed - Showdown with Kallax.
Completed - Old Obligations.
Killed 1000 monsters.
Started a relationship.
Completed - Zardom's Battle Plan.
Completed - Origin The Power of the Center.
Sealed the fate of Abessa City.
Joined the Berserkers.
Learned all Cleric skills.
Joined the Clerics.
Learned all Outlaw skills.
Cold value has reached 90
Completed 300 missions.
Joined the Outlaws.
Completed - Decaying Powers.
Earned 100,000 Elex shards.
5 companions
Reached level 20.
Fallen to death 20 times.
Completed - Tramp Confederacy.
Killed 20 Albs.
Killed 20 bandits.
Killed 300 monsters.
50 successful pickpockets
Completed - The Claws.
Killed 50 people
Completed - Chaos of Emotions.E86
Completed - Stolen Equipment.
Earned 10,000 Elex shards.
Teleported 20 times
Earned 1000 Elex shards.
Killed 20 monsters.
Played 80 hours of Elex.
Completed - Survival
First jet pack flight