My rating: PG-13 [borderline with R] for some disturbing images, nudity, violence and gore.
Positive Messages & Role Models: 0.5/5 - Very few can even remotely be considered positive.
Violence: 4/5 - Infrequent (unless you count the pervasive discussion), but when it comes up, it's intense. Most noticeably, disturbing and gross images of bodies wrapped in foam; and a scene in which a man graphically axes through the head of a man who has been abducted, with blood shown.
Sex: 3.5/5 - Bodies wrapped in foam show exposed breasts, though not graphically. Also, in the last few scenes, a woman walks around completely nude, and we see her from the waist up. Milder examples, also, such as a few brief kisses.
Language: 1.5/5 - Nothing stands out.
Consumerism: 0/5 - No problem.
Drinking & Drugs: 1/5 - Nothing noticeable.