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