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