Alien³
Like with Terminator, it seems like part 3 did more damage than the original sequel.
While Aliens expanded on the original concept, this one ventures more into generic action film territory. Not much to care about, though it's nice to Pete "Kobayashi" Postlethwaite get a small part. Even Sigourney Weaver looks a bit lackluster in this one and the Lance Henriksen cameo was a bit forced.
David Fincher probably did what he could with the script he was given, but at that point, he was still a way away from his later masterpieces.
It makes me want to say something nice, because somewhere in there, there's something that convinced a studio exec to give him the green light to do Seven. What it is? Not sure yet.