I fired up Dim Pro and the following are JUST the beginning of the 01-Dimensions section.
You'll get "traditional" sounds (clanks and such), but remember that lots of sounds can be spooky because they sound like "Alien" or "Halloween" or "Blade Runner" or your Ex's voice or whatever. Think outside the coffin!
Anyway, they're all here, and I just got up to "G" and got tired. (Although it's always fun to audition the great sounds in Dim Pro and Rapture.)
Dimension Pro- 01 DimensionsAlien Force, use chromatic key changes
Alien Piano 3
Amorphous (turn off element 1?)
Antarctica (wind noises)
As you wish (do staccato 'psycho' stabs)
B4rdOK Noise
Brasses from Hell (use elements 1 and 4 only)
Built-in Mamooth
Cathedral 3, play diminished chords or Bach toccata in D
Chimery
Close to Origin, play tri-tones
Cosmic Winds (Blasted Heath - "I am more sinned against than sinning!")
Dark City
Death Sentence Chimes, this'll freak everybody out, play a long spaced LOW note (and don't ask for whom it tolls)
Devil Flute/Devil's Flute is, surprisingly, not so recommend. More shrill, not so devilish
Dimensional Brain 3, find the right chords
Dispossessed = DOOM!
Distant Boom, put these on top of held down notes of Winnowing Machine, "Incoming!"
Distorted Perception, perhaps
Distractive Buzz, swarm of killer bees?
Diva on mw, sort of theriminy, play the Dies Arae melody and go wild with the mod wheel
Dubious 1 and 2, good hits, put them on top of one of these other patches
Dynamic Cylinder, your basic "Klatuu barada nikto"
Earth & Mars Orchestra, good cinematic stings
Earth Core, hold down chords
Enigmatic Voices, hold low chords and play dissonant highs
Expression of Misery, change the AMP envelope to fade in
Extraterrestrial Meeting 1/2/3, put them all together and freak out the neighborhood dogs
Far Far Away, actually element 3 is all you need
Fear of Flying, changed my mind, put Distant Boom on top of this instead
Feel Noises, turn off element 1, play low and high notes
Fluorescent Windchimes
Foreign Experience, hold lows and ping the highs
Fragments from a wreck, diminished chords
Frightening Place 1/2, duh!
Getting Close, hold chords for five seconds and release
Ghost ships, play chords