None.

A few scenes towards the end feature blood but nothing gory. However, the entire film revolves around cannibalizing other human beings, which in itself, though never explicitly shown on screen, is gory.

A man is shot to death.

A man stabs himself and commits suicide.

'Damn' is used a couple of times.

A character smokes tobacco once. Smoke isn't even shown, simply the pipe in his mouth.

The entire movie is meant to have a frightening atmosphere because of it's theme.