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