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