This page is for the original version of the game. For the Redux version of the game running on Unreal Engine 4, see The Vanishing of Ethan Carter Redux.
Key points
General information
<path-to-game>\Binaries\Win64\AstronautsGame-Win64-Shipping.exe
%USERPROFILE%\Documents\My Games\The Vanishing of Ethan Carter\
Notes
%WINDIR%\System32
%WINDIR%\SysWOW64
<path-to-game>\Binaries\Win64
~/.steam/steam/userdata/<user-id>/258520/