Here is the full list of all 8 World Annihilation Operations Parts I-IV achievements.
Played through Part I.
Played through Part II.
Played through Part III.
Played through Part IV.
Managed to eat the cauliflower.
Defeated the demon's puzzle less than 10 minutes 30 seconds after starting up Part III.
Learned the truth less than 6 minutes after starting up Part IV.
Liberated the octopuses less than 7 minutes after starting Part II.