Full list of all 22 World II: Hunting Boss achievements worth 1,000 gamerscore. It takes around 3-4 hours to unlock all of the achievements on Xbox One.
Defeat Steel Dragon
Defeat Lava Ape
Defeat Butcher
Defeat Beholder
Attack Damage Carry
Defeat Gianyvern
Violet reaches Lv 10
Dorrit reaches Lv 10
Sean reaches Lv 10
Own 3 Heroes
Complete 5 D-Grade missions
Complete 12 C-Grade missions
Complete 10 B-Grade missions
Finish missions and get 5 A-ratings
Finish missions and get 5 S-ratings
All heroes reach Lv 5
All heroes reach Lv 10
All heroes reach Lv 15
All heroes reach Lv 20
Complete mission 10x
Fail mission 10x
Completion of all achievement