Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Legitimate Party Maker	Completed Chapter 15.
A Novice Party Maker	Completed Chapter 1.
A Renowned Party Maker	Completed Chapter 18.
Advent of the Angel	Let Bunny make the Angelic Dress and used it in a battle.
Armageddon	Annihilated your own party using The Doooorrr's skill, "Shatter."
Battle Master	Completed the 30th Challenge.
Birds of a Feather Flock Together	Used a combined skill for the first time.
Collector	Acquired 50 characters.
It's Dragora Time!	Used Dragora's skill, "Please Eat Me!!"
Lady Luck Is Smiling on Me!	Summoned a legendary character using the Fragment of the World.
Long and Grinding Road	Walked 10,000 steps.
Nice to Meet You!	Came to Papaverine's Store and talked to the vendor for the first time.
PARTY RUSH!!	Completed Chapter 20.
Partydex Complete!!	Acquired 100 characters.
Sewerage Dweller	Entered the research laboratory from the sewerage.