Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Obtained high-grade materials	[Expert Undernaut Mission] You established yourself as a collector of A-rarity weapons and armor.
Obtained low-grade materials	[Novice Undernaut Mission] You established yourself as a collector of C-rarity weapons and armor.
Obtained mid-grade materials	[Standard Undernaut Mission] You established yourself as a collector of B-rarity weapons and armor.
Obtained special-grade materials	[Legendary Undernaut Mission] You established yourself as a collector of S-rarity weapons and armor.
Obtained starter-grade materials	[Rookie Undernaut Mission] You established yourself as a collector of D-rarity weapons and armor.
[Mission] Disposed of the Anguished Sinner	[Standard Undernaut Mission] You disposed of the Anguished Sinner.
[Mission] Disposed of the Desirous Sinner	[Standard Undernaut Mission] You disposed of the Desirous Sinner.
[Mission] Disposed of the Envious Sinner	[Standard Undernaut Mission] You disposed of the Envious Sinner.
[Mission] Disposed of the Gluttonous Sinner	[Novice Undernaut Mission] You disposed of the Gluttonous Sinner.
[Mission] Disposed of the Prideful Sinner	[Expert Undernaut Mission] You disposed of the Prideful Sinner.
[Mission] Disposed of the Reckless Sinner	[Novice Undernaut Mission] You disposed of the Reckless Sinner.
[Mission] Disposed of the Slothful Sinner	[Expert Undernaut Mission] You disposed of the Slothful Sinner.
[Mission] Disposed of the Violent Sinner	[Novice Undernaut Mission] You disposed of the Violent Sinner.
[Mission] Disposed of the Wrathful Sinner	[Expert Undernaut Mission] You disposed of the Wrathful Sinner.
[Mission] Escaped from Yomi	[Legendary Undernaut Mission] You escaped from Yomi.
[Mission] Reached the other company's camp	[Rookie Undernaut Mission] You reached the other company's camp.
[Mission] Returned to the surface	[Expert Undernaut Mission] You exited Yomi and returned to the surface.
[Mission] Returned to your company's camp	[Rookie Undernaut Mission] You returned to your company's camp.
[Mission] Revived the Divine Child	[Legendary Undernaut Mission] You revived the Divine Child.