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Several headshots (to aliens, predators and humans) with knives and guns.An alien gets its head chopped off in full view (green slime and gore goes everywhere).A facehugger is sliced in two.Several off-screen killings with the corpses shown later; a few on-screen killings show much blood and gore, some of which is shown spewing out everywhere.An alien bursts out of a woman, blood can be seen but the scene cuts away before anything is shown. (NOTE: in the unrated cut, there are a few more seconds footage of the alien ripping out of her)An alien/predator hybrid bursts out of a predator at the end of the film, lots of green blood shown.
One use of the F-word at the very end of the movie - pretty much just to give it the PG13 rating.Several other milder words throughout.
The whole movie has a very eerie and "sneak up on you" feeling to it. A few "jump" scenes.
