Here is the full list of all 23 Ape Out (Windows) achievements worth 1,000 gamerscore.
Escaped High Rise on Hard
Completed Break In
Escaped Subject 04 on Hard
Completed the Game
Escaped Adrift
Escaped Fugue
Escaped High Rise
Escaped Subject 04
Completed an Album without Taking Damage
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Escape Subject 04 Arcade
Escape Subject 04 Arcade on Hard
Escape High Rise Arcade
Escape High Rise Arcade on Hard
Escape Fugue on Hard
Escape Fugue Arcade
Escape Fugue Arcade on Hard
Escape Adrift on Hard
Escape Adrift Arcade
Escape Adrift Arcade on Hard
Complete Break In on Hard
Complete the Game on Hard
Complete an Album without Killing Anyone