A single reference. Nothing to be concerned about.

A man shoots a woman in the back in a nightclub (bloody hole seen), and then fires at two cops.

Two muggers attack two undercover cops in the beginning. One cop knocks a man over and punches him a few times, then kicks him. The other cop chases down the last mugger, who attacks him with a knife. He disarms the man, and knocks him out.

A man shoots a woman in a TRAM car (not graphic), and throws her body out,. It falls into the river below.

There's a brief shootout between a man and several cops. A woman is shot in the head (small hole seen, blood spatters on a bus), and much gunfire is exchanged. The man escapes in the bus, and it crashes off a pier and lands in a river.

Two cops with guns burst into a room full of men and hold them at gunpoint, and one of them roughs a man up and pushes him down, holding him at gunpoint.

Wulfgar shoots several men in a stairwell (very bloody), and then shoots another man. The man's corpse is seen with a large bloody bullet hole visible, as well as blood spatter on the wall.

There's a long foot chase in which two cops pursue a man through streets, a construction site, and a subway station. The man shoots at them, and they return fire. The man holds a woman at knifepoint, but lets her go, and the chase ends when he cuts one of the cop's faces with a razor (mildly bloody), and escapes.

Wulfgar kills a woman (offscreen). Scene fades out before it happens, but we learn later that she's dead.

19 uses of "f**k" (8 paired with "mother"), 6 uses of "shit", 6 uses of "hell", 7 uses of "damn" (2 paired with "God"), 7 uses of "ass" (1 used as "asshole"), 5 uses of "bitch", 3 uses of "bastard", 4 uses of "Christ", and 1 use of "Jesus".

Alcohol is seen being poured at a party.

The foot chase is very long and intense.

The opening scene is intense.

The TRAM car scene is intense.

The whole movie is extremely intense, particulary scenes with Wulfgar.