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