Nothing at all.

A man gets shot with a bazooka and explodes.

A man gets a grenade shoved into his mouth and explodes.

Dozens upon dozens of people get shot, get blown up, stabbed, burned or electrocuted. A couple of characters are tortured, and two characters get into a fairly brutal fight. Despite the high bodycount, most kills are bloodless, save for a few instances.

"Shit" is used 5 times, among other mild profanities.

Some smoking.