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