Here is the full list of all 12 You Don't Have Time achievements.
Press the first button of the game.
Solve the room 08.
Try 30 wrong codes on a digicode.
Enter 04:02.
Finish the game in less than 1 hour.
Activate a generator more than 20 times.
Finish the game.
Solve the room 22.
Solve the last Simon.
Finish the first stage.
Solve a Simon in one try.
Enter the missing hour.