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