Here is the full list of all 9 Estranged: Act I achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Take John's bucket to the end of the game.
Rudely interrupt the evening news.
Finish the game without picking up the flashlight.
Empty all vending machines.
Score 15 or more points in the shooting gallery.
Turn off the lamp in Redton Nature Reserve.
Don't escape the chair.
Finish the game.
Watch the video of the cat.