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