The Hidden Room Title update for Secret Pie has 17 achievements.
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