In one scene, there are pictures of nude women pinned to the wall in the background. They're clearly visible. This moment happens at 1:21:55-1:23:15 (Theatrical) / 1:20:00-1:21:45 (Director's Cut)

Not noticeable at all but in the opening of the movie when the crew wakes up out of hyper sleep, if you look closely you can see a topless women with covered nipples. This moment happens at 5:40 in the movie (both theatrical & director's cut)

Woman undresses to underwear. Slight rear nudity.

Blood starts to pour and "rain" down on two characters, right after another character is killed offscreen

Film has some offscreen kills.

The alien shoots its teeth into a man's head. (quickly, before the camera cuts away). Minor gore.

In the directors cut an alien bites into a man's head.

A character is killed offscreen, but their scream is heard.

A man cuts a "finger" of a facehugger and it bleeds acid.

A woman is punched, which causes her nose to bleed.

5 uses of the F word, 8 uses of 'Shit', 18 uses of 'Hell' 11 uses of "Goddamn" 10 uses of 'God' 5 uses of 'Son of a bitch' 2 uses of "Jesus" 1 use of 'Ass' 1 use of 'Crap' 1 use of "For Christ's sake" 1 use of "For God's sake" and 1 use of "Jesus Christ".

'B*tch' is said at least twice.

The crew members smoke cigarettes and drink canned beer.

The Alien is still very scary, even by today's standards.

Rated R for Some Intense Monster Violence, Terror, Gore, and Language, And A Scene Involving Intense Detailed Disturbing Images.