Here is the full list of all 17 Kautic achievements.
Make 30% of the game progress
Make 20% of the game progress
Eliminated the Father Treant Boss
Make 10% of the game progress
Make 40% of the game progress
Make 50% of the game progress
Make 60% of the game progress
Make 70% of the game progress
Make 80% of the game progress
Make 90% of the game progress
Make 100% of the game progress
Eliminated the Air Elemental Boss
Eliminated the Kavu Boss
Find all Relics
Kill all enemies
Find the Kautic hat