Full list of all 82 Secret Pie achievements.
The base game contains 48 achievements, and there are 2 DLC packs containing 34 achievements.
Chapter End
Chapter 18 clear
Chapter 17 clear
Mei ♀♂♥ Chapter3 Clear
Chapter 16 clear
Mei Favorability 6
Airi ♀♂♥ Chapter3 Clear
Chapter 15 clear
Airi Favorability 6
Airi Favorability 5
Mika ♀♂♥ Chapter3 Clear
Chapter 14 clear
Mika Favorability 6
Mika Favorability 5
Mei ♀♂♥ Chapter2 Clear
Chapter 13 clear
Mei Favorability 5
Mei Favorability 4
Chapter 12 clear
Mika Favorability 4
Airi ♀♂♥ Chapter2 Clear
Chapter 11 clear
Airi Favorability 4
Mika ♀♂♥ Chapter2 Clear
Chapter 10 clear
Mika Favorability 3
Chapter 9 clear
Airi Favorability 3
Mei ♀♂♥ Chapter1 Clear
Chapter 8 clear
Mei Favorability 3
Mika Favorability 2
Airi Favorability 2
Mei Favorability 2
Mei Favorability 1
Chapter 7 clear
Chapter 6 clear
Chapter 5 clear
Chapter 4 clear
Mika ♀♂♥ Chapter1 Clear
Chapter 3 clear
Mika Favorability 1
Airi ♀♂♥ Chapter1 Clear
Chapter 2 clear
Airi Favorability 1
Chapter 1 clear
SecretPie Start!
SecretPie Play!
Start SecretPie Festival
DLC1 Chapter 1 clear
DLC1 Chapter 2 clear
DLC1 Chapter 3 clear
DLC1 Chapter 4 clear
DLC1 Chapter 5 clear
DLC1 Chapter 6 clear
DLC1 Chapter 7 clear
DLC1 Chapter 8 clear
Lina ♀♂♥ Chapter1 clear
Lina ♀♂♥ Chapter2 clear
Ran ♀♂♥ Chapter1 clear
Yui ♀♂♥ Chapter1 clear
Yui ♀♂♥ Chapter2 clear
Ran ♀♂♥ Chapter3 clear
Lina ♀♂♥ Chapter3
Start Hidden Room
DLC2 Chapter 1 clear
DLC2 Chapter 2 clear
DLC2 Chapter 3 clear
DLC2 Chapter 4 clear
DLC2 Chapter 5 clear
DLC2 Chapter 6 clear
DLC2 Chapter 7 clear
DLC2 Chapter 8 clear
DLC2 Chapter 9 clear
DLC2 Chapter 10 clear
Io ♀♂♥ Chapter1 clear
Io ♀♂♥ Chapter2 clear
Sia Sea ♀♂♥Chapter1 clear
Sia Sea ♀♂♥Chapter2 clear
Sia Sea ♀♂♥Chapter3 clear
Mary ♀♂♥Chapter1 clear