28 Days Later -> http://www.youtube.com/watch?v=DbwlGv9SWfY
Dead Silence -> http://www.youtube.com/watch?v=hio1fHy_3HM
The Ring -> http://www.youtube.com/watch?v=ARANSQ15Vrk
Halloween -> http://www.youtube.com/watch?v=iP-jYiuDD9g
Saw -> http://www.youtube.com/watch?v=vhSHXGM7kgE
Paranormal Activity -> http://www.youtube.com/watch?v=jaqa6u3xgqo
We found that these soundtracks suited our requirements and they fitted the mood of our main opening scene. These also inspired us into researching new techniques and sounds using certain software such as 'Garageband' in order to create our own soundtrack in a similar style:
We found techniques that creates the right sort of sound we wanted. For example, the eerie/ethereal noise effect from a Glass Armonica but with wine glasses:
http://www.youtube.com/watch?v=kzJC1ENMdeI
http://www.youtube.com/watch?v=XKRj-T4l-e8
Also, there is playing guitar with a violin or e-bow based on the band Sigur Rós, as played by Jónsi Birgisson:
http://www.youtube.com/watch?v=531JCuZZ4pw
http://www.youtube.com/watch?v=kQsPv4FMyLg
We used 'Garage Band' in order to make our original recordings sound eerie/menacing. We also used this to construct our soundtrack.