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