I saw this as one of 10 horror films on a collection from brentwood DVD called;fright night,its an awesome collection of fright films.anyway the devils nightmare is a Belgium/Italian made shocker about a group of tourists(each one represents one of the 7 deadly sins)they get stranded at the castle of an ex Nazi officer.there's a family curse,gruesome murders,lots of nudity(surprising for 1971)and a very good soundtrack. I'm usually a sucker for good European horror movies especially with the sexy beautiful Erika blanc,who starred in many Italian horror films.sort of like a rival of Barbara Steele.the murders are very gruesome.the dubbing is sloppy but thats expected.i saw this years ago on the USA cable network,of course it was chopped up by the censors. it was hosted by commander USA.who used to show very strange movies. watch the uncut version for the full effect.ignore the critics because most of them dismissed this film as junk.you be the judge.believe me its kind of scary.8 out of 10,Erika blanc gets 10 out of 10 because she was hot.