Corrected entry: When the marines look at the blueprint of the atmosphere processing plant, you can see that the plant is a smooth cone or dome like structure. You can also see the structure when the marines first arrive at the plant to look for the mising colonists. But when Ripley goes back to the plant to look for Newt, the structure of the plant changes completely to resemble something that looks like an off shore oil rig with spires and towers and pipes going all over the place.
Corrected entry: How is it that the marine drop-ship immediately plunges towards the planet's surface when released from the mother ship, but the mother ship itself appears to be in a stable orbit around the planet? One of the two ships is defying the laws of physics.
Corrected entry: In the hive, when Hicks puts his shotgun tip into an open egg, watch the camera angle of the camera mounted on his shoulder, the gun is off to the side and it should be in the middle of the screen seeing as how the camera is mounted on the shoulder holding the gun.
Corrected entry: When Ripley is in the atmosphere processor, trying to get away from the queen and gunning down drones, the camera keeps tracking the ammo counter, and it gets down to really low...about 9. She then shoots lots more rounds (if the previous speed that the counter goes down by is any comparison), far more than she had the ammo for.
Corrected entry: In the director's cut watch the temperature guages on the remote sentry controls, you only see the temperature change once, regardless of whether the guns were firing or not.
Corrected entry: In the director's cut, the marines had salvaged four robot autocannons with motion-targeting systems, two of which are placed in the access tunnel to the power plant. Right before they close the hatch, Hudson and Vasquez throw in a waste bin to test them; it is shot to pieces. Later, however, these autocannons still have their full ammo load, as seen on the computer counters.
Corrected entry: Towards the end of the movie, Ripley calls down both elevators to escape the Queen. When they arrive, she gets into the one on the right, leaving the Queen to use the one on the left. When the lifts reach the top, Ripley comes out of the one on the left and the Queen comes out of the one on the right.
Corrected entry: When we are shown the screen of the marines names there is a curious omission. It lists the marines by rank first: Lt. Gorman, Sgt. Apone, Cpl.Hicks, Cpl. Ferro, Vasquez, Drake, Spunkmeyer, Cpl. Dietrich, Frost, Wierzbowski, and Crowe followed by the non-marines Bishop, Ripley and Burke. Where is Hudson?
Corrected entry: In the scene where the baby alien pops out of the woman's chest, she eventually dies but her head leans to her side instead of hanging forwards as it should do but then in the next shot of her, her head is hanging forwards. (01:09:35)
Corrected entry: Lt. Gorman is supposedly knocked unconcious when an overhead storage compartment in the APC comes loose and dumps a whole hord of boxes on him. I guess he's a pretty fragile guy because if you watch the scene in slo-mo the only part of his body that actually comes in contact with the boxes is his right arm. His head is never hit or even touched by them.
Corrected entry: In scene where Ripley first meets Bishop he says "It is against my programming to harm a human being or through a course of action allow a human being to be harmed." Funny how he says this after doing the knife trick on Hudson (a course of action that could have definitely caused harm to Hudson).
Corrected entry: When the Marines are underneath the "primary heat exchangers," Dietrich is grabbed from behind by an alien, and her flamethrower discharges, igniting Frost. He flies over a railing and down a shaft. If you watch the sequence, you will see that when Frost hears Dietrich scream, he turns to face her, raising his pistol. At this point, he is facing away from the shaft. Flames fill the frame as he is engulfed. In the very next shot, he is on fire, and is charging full speed toward the shaft. There wasn't enough time for him to turn around 180 degrees.
Corrected entry: Near the end of the movie, Ripley rescues Newt amidst the computer voice reminders that the station is going to explode, however she stops long enough to pick a fight with the Alien by shooting a bunch of the young ones. The Alien detaches from the egg sack production line and starts chasing Ripley. If she had just left Mom alone the explosion would kill everything.