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