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