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