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