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