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