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