Here is the full list of all 24 The Chronicles of Nyanya achievements.
Kill all creatures in the Marshland of Eternal Wetness.
Raise a Toxic Roll.
Complete the game with high Friendship level.
Raise a Rollicorn.
Give the bad news about the meowbarian twin.
Purchase all the shoes available in the game.
Don't kill anyone you don't need to kill.
Find the Queen of Triis.
Have your party titled The Rolls of Splendor.
Tell Francat the truth about Prior's favorite dessert.
Win the Great Battle.
Complete the game with low Friendship level.
Complete all the important tasks while scouting.
Complete all the basement trials with excellent results.
Convert the leader of Meowdur’s Gate bandits.
Defeat the Cat o’ Nine Tails.
Prepare an ideal coffee.
Put a group of drowncats to sleep.
Save a roll with icing in the Marshland of Eternal Wetness.
Leave the Underslipper with the Fury of Catsiris.
Gather all discount coupons in Meowdur’s Gate Orderbox District.
Cheat Catar Spotted-Silvershield.
See the Great Bowl of Goodness.
Receive the Medal of the Good Kitty.