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