The Bunker is pretty much entirely just video footage and cutscenes, meaning it doesn't require very powerful hardware to run. A low-end graphics card such as a GeForce GTX 260 is all that is necessary, although for a smoother experience a more powerful card may be necessary.
A callback to classic adventure games of yesteryear, The Bunker is a game entirely made of FMV (Full Motion Video) footage. Players must make important choices in order to escape from a nuclear bunker alive.