Here is the full list of all 36 Conan Exiles achievements.
Defeat the Giant Spider
Reach the volcano
Defeat the Sewer Abomination
Reach the skies above the Exiled Lands
Defeat Hrungnir of the Frost
Defeat the King Beneath
Defeat the Undead Dragon
Craft an Exceptional or Flawless item
Defeat the Giant Crocodile
Kill something by standing on its head
Reach level 60
Defeat the Kinscourge
Reach level 50
Reach level 40
Reach level 30
Create your first building
Put an enemy in the Wheel of Pain
Reach level 20
Use a religious altar
Reach the highlands
Fall for 3 seconds without dying
Reach level 10
Complete the first chapter of the Journey
Sleep on a bed or bedroll
Get a Dedicated Weapon