Here is the full list of all 25 The Subject achievements.
Find the flashlight
Successfully hide while monster passes your hiding spot
Turn on the flashlight
It does nothing...
Finish the tutorial sequence
Die
Beat the game
Collect all card compenents
Die while hiding.
Solve testing room Shurin
Solve testing room Amada
Solve testing room Wilrem
Solve testing room Ark
Try to leave end area
Find an easter egg
Beat the game without charging the flashlight
Beat the game without saving
Press all placebo buttons
Beat the game without being seen
Enter a cheat code
Connect to Twitch with Twitch integration
Have viewers vote for your achievement.
Find the data tablet.
Find another way in.