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