Here is the full list of all 23 APE OUT achievements.
Complete Break In on Hard
Escape Adrift Arcade
Escape Fugue Arcade
Escape High Rise Arcade
Escape Adrift on Hard
Complete the Game on Hard
Escape Fugue on Hard
Escape High Rise on Hard
Escape Subject 4 on Hard
Complete Break In
Escape Subject 04 Arcade
Escape Adrift
Complete the Game
Escape Fugue
Escape High Rise
Escape Subject 04
Escape High Rise Arcade on Hard
Escape Subject 04 Arcade on Hard
Escape Fugue Arcade on Hard
Escape Adrift Arcade on Hard
Complete an Album without Taking Damage
Complete an Album without Killing Anyone
....