Sexual Content: One of the cabins is full of pornographic magazines and posters. The posters adorn the walls, but they aren't viewed up close and the images aren't seen very clearly (they are explicit, though). They don't serve a huge purpose to the story, they are simply there in one scene and one of the magazines is rolled up and used as a weapon when Ripley and Ash get into a fight. At one point Ripley strips down to nothing but an undersized undershirt and skimpy panties (the top of her buttocks are visible, and her nipples are obviously poking through her tank-top). She remains like this for quite a long time. When Lambert complains about the food not tasting nice, Parker says, "I'd rather be eating something else right now, but right now I'm thinking food," an oral sex reference. It's implied that the Alien rapes Lambert (she's naked and hanging from a ceiling -- only her foot is seen).
The alien bursts through Kane's chest while he is eating dinner with the rest of the crew (blood spurts in few places, including on some people). This scene is very intense, he begins to choke and then starts squirming around. then he starts having a seizure sort of thing and begins to scream and yell. The Alien tries to burst out of him and succeeds on the third try. It looks around, surrounded by blood and some gore (not detailed but there is a lot of blood), while the man's hands twitch and have spasms.
The alien attacks a Brett and pierces his head with a headbite, then drags him into a ventilation shaft (a puddle of blood is shown in the Director's Cut).
Lambert and Parker get killed by the Alien: The Alien sneaks up on Lambert and Lambert freezes with fear. Parker attempts to kill the Alien with his flamethrower, but fears he may injure Lambert as well, so he charges at the Alien, but the Alien notices him and throws him into a wall. It pins him against the wall, denying him the chance to escape, and then kills him with a headbite. After that, it corners Lambert and kills her off-screen (her screams are heard over the intercom). Shortly afterward, their bodies are seen, and it appears that Lambert's body is naked, hinting that the Alien raped her.
A man is hit in the head with a fire extinguisher and white substance comes out of him; he is then hit once more and his head tears off; moments later, we figure out he is a robot; afterwards, the crew asks him questions and at first he answers with sputters and spurts (his blood is white and milky, though).
A man cuts a "finger" off of a facehugger and it bleeds acid.
Ripley is attacked and beaten severely by a human-like robot or android on-screen (her nose bleeds and she makes disturbing moans as she is being thrown all over the place). 7.2 out of 10.
Profanity: At least 5 "f" words (6 in the Director's Cut) and 8 "s" words. Other words include at least: 16 "hells," 8 "damns," 5 "S.O.B.'s," 2 "craps," 1 "ass," 1 use of "bitch" (3 in the Director's Cut) and 1 use of "bastard." Religious exclamations and profanities include at least: 11 uses of "Goddamn," 8 of "Oh, God," 2 uses each of "For Christ's sake," "Jesus," "Oh, my God" and "God" and 1 use each of "Jesus Christ" (2 in the Director's Cut) and "For God's sake." 5.6 out of 10.
Substance Use: Lambert, Brett, Kane and Ripley smoke cigarettes several times, while the crew drink a beer called Aspen Beer at the dinner table.
Conclusion: "Alien" is a classic sci-fi horror film that has stood the test of time. It has a good script, a great story, memorable performances, and of course, a great protagonist. This film is amazing and I definitely recommend it. I give this film 8.9 out of 10.