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