Here is the full list of all 50 ELEX achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Fed Mana to the Hybrid.
Sided against the Hybrid.
Learned all Outlaw skills.
Sealed the fate of Abessa City.
Joined the Outlaws.
Completed - Tramp Confederacy.
Cold is 10 or lower.
Learned all Berserker skills.
Played 80 hours of Elex.
Joined the Berserkers.
Killed 1000 monsters.
Completed ELEX.
Served the Hybrid.
Modified weapons 20 times
Collected 20 pictures.
Fallen to death 20 times.
50 successful pickpockets
Learned all dexterity skills.
Learned all character skills.
Learned all fighting skills.
Found Calaan
Learned all survival skills.
Cold value has reached 90
Completed 300 missions.
Picked 100 locks.
Cracked 50 safes
Completed - The Claws.
Completed - Showdown with Kallax.
Completed - Old Obligations.
Learned all Cleric skills.
Started a relationship.
Earned 100,000 Elex shards.
Completed - Zardom's Battle Plan.
Killed 20 Albs.
Killed 300 monsters.
Completed - Origin The Power of the Center.
Killed 50 people
Reached level 20.
Killed 20 bandits.
5 companions
Killed 20 monsters.
Earned 10,000 Elex shards.
Completed - Chaos of Emotions.E86
Joined the Clerics.
Completed - Decaying Powers.
Teleported 20 times
Completed - Stolen Equipment.
Earned 1000 Elex shards.
Completed - Survival
First jet pack flight