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