How does it compare with this one and which one is better? https://moviechat.org/tt0075921/Death-Game
"knock knock" is a very close remake of "death game". basically the same movie, just with different actors and a different soundtrack.
And apparently both Death Game actresses including the late Clint Eastwood fairly err "regular" Sondra Locke have produced this movie.
Bitter Harvest (1993) with Steven Baldwin and Patsi Kensit has the same premise as well.
As does in a way "Kill Cruise" (1990) (aka Der Skipper) starring also Patsy Kensit, Elizabeth Hurley and Jurgen Prochnow.