Banned in Germany. But strangely, not due to violence in the movie but due to its tone.
Cast and crew were not told what scenes were being shot and when until right before set ups.
Shot continuously over a 15 day span.
Cast agreed to be locked inside the house for the duration of production. Only when their characters were killed in the movie were the actors permitted to leave set.
All of the actresses are named after famous golden age actors.