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