Some sexual references

Unseen invaders break down a door and hit a man, knocking him to floor; character clobbered in the face with something metallic-sounding. Pool of blood on floor. Bloody head wound. Swollen, bloody face. Knife. Underground fight club sequence; character held while another beats him up (repeated punching). Sounds of pig in distress, frantic squealing. Death/suicide discussed. Scene of chopping game hens

Nic Cage's face is covered in blood and bruises for almost the entire movie.

28 uses of fuck heard throughout as well as various other uses of strong language.

Some alcohol drinking.

Edited: The following has been removed for giving away the ending

Intense emotional scenes.