Here is the full list of all 15 The Vision Of The Ant achievements.
Recruit your first monster
Gotta enslave them all!
Find your first treasure
Find 400 Treasures
Finish your first Quest
Do every quest in Vaela
Finish the game
Finish the game under 5 hours
Achieve S Rank
Achieve S+ Rank
Reach Level 25!
Master the Slayer
Master the Zealot
Master the Druid
Kill Ahriman