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.
Completed - Showdown with Kallax.
Completed - Old Obligations.
Started a relationship.
Completed - Zardom's Battle Plan.
Completed 300 missions.
Completed - Origin The Power of the Center.
Earned 100,000 Elex shards.
Killed 300 monsters.
Reached level 20.
Completed - Chaos of Emotions.E86
Killed 20 bandits.
Killed 20 Albs.
Killed 50 people
5 companions
Joined the Berserkers.
Completed - The Claws.
Sealed the fate of Abessa City.
Completed - Tramp Confederacy.
Teleported 20 times
Earned 10,000 Elex shards.
Killed 20 monsters.
Completed - Stolen Equipment.
Earned 1000 Elex shards.
Completed - Survival
First jet pack flight
Cracked 50 safes
50 successful pickpockets
Completed - Decaying Powers.
Joined the Clerics.
Joined the Outlaws.
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