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