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.
Finish the game without picking up the flashlight.
Take John's bucket to the end of the game.
Empty all vending machines.
Rudely interrupt the evening news.
Don't escape the chair.
Turn off the lamp in Redton Nature Reserve.
Finish the game.
Watch the video of the cat.
Score 15 or more points in the shooting gallery.