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