Here is the full list of all 19 Project Temporality achievements.
Finish the first 3 levels
Finish a level in below 3 minutes
Learn the secrets of the sun being visible through every window.
Reading 5 journals
Succesfully solve your first puzzle with a time clone
Escape the Admirals trap
Finish the whole game.
Beating the game with 2 Stars
Beating the game with 3 stars
Reading 25 journals
Reading ALL journals
Use the maximum number of Time clones to solve a puzzle
Help Gray get her files.
Get the RFID code to escape
Solve the first paradox puzzle
Finish the first 5 levels
Finish the first 8 levels
Finish the first 12 levels
Solve the first Temporality fielded puzzle