Lists by petterspinetta

a list of 2 titles
Please help me find the BEST underwater underearth sci fi movies, if they have some horror, they will be so much appreciated...
 
a list of 3 titles
I think is very hard to find some REALLY GOOD space-horror movies, that really happened in actual Spaceships, Spacestations, Openspace or so but please exclude : series like Star Trek, Battlestar Galactica and all the others, old classic movies unless they are as good as "Galaxy Of Terror", Alien saga ( in despite this is the more representative of what i'm looking for, i already watched 100 times ), black & white, comedies, romance, etc
 
a list of 1 titles
Is there any movie similar to "Pink Floyd The Wall"? For me this is the ultimate masterpiece of cinema arts, but i wonder if anyone can tell me another movie that can be similar, as good as, as crazy as.
 
a list of 7 titles
The VERY BEST real SCI FI movies of ALL