Alien 3 (2003 Directors Cut):
The third movie in the series and a third director. And also a third type of movie.
As previously stated in my posts on Alien and Aliens:
Alien (directed by Ridley Scott) is a sci-fi horror movie.
Aliens (directed by James Cameron) is a sci-fi action adventure/war movie.
Alien 3 (directed by David Fincher) is essentially a sci-fi art flick (with an alien that's trying to kill everyone.) 
It is once again noticeable immediately. From the beginning much care is given to how each shot looks. The sets are big and elaborate and rusty.  There's rain and steam and fog, which aren't used so much to hide the monster, but to make it all look just so.
We're back down to only one alien, but there's no real attempt to establish the horror aspect of the first movie. And there are zero guns. 
There's plenty of running around and dying. The monster is plenty nasty.  But the plot and the director are more interested in the morality tale and the well shot visuals than the action or horror.
I remember when this movie came out a lot of people were kind of disappointed in it. A fact born out by the fact that on IMDB.com this film rates a full two points lower than the first two films. And I can understand people's disappointment. This film is not its predecessors, but then the second film wasn't the same as the first.
If you watch it realizing that. If you watch it on its own merits, I think it is just as good as the other two.
For the record, six years had passed since the second movie was made and the spfx have jumped forward again. We once again get to see half an android talking and this time it looks pretty awesome. Not much to say on what the computers and other technology look like, since it takes place on a prison planet and that's pretty much what it looks like.
Alien 3: A-
 - But in an arty way.
 - Seriously rusty.
 - Until the very end when the "rescue" ship shows up.
 - Though it now has a sort of bovine aspect to it because of its initial host.