Obscure:

After Dark My Sweet -  http://www.imdb.com/title/tt0098994/plotsummary

 Limbo - http://www.imdb.com/title/tt0164085/

 At Play in the Fields of the Lord - http://www.imdb.com/title/tt0101373/

 Oleanna - http://www.imdb.com/title/tt0110722/

 Pi - http://www.imdb.com/title/tt0138704/

 Denial - http://www.imdb.com/title/tt0101707/

 Intacto - http://www.imdb.com/title/tt0220580/

 Cube - http://www.imdb.com/title/tt0123755/

 Total Eclipse - http://www.imdb.com/title/tt0114702/