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