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