Available on tubi
You can watch this on the free streaming service tubi right here:
https://tubitv.com/movies/460336/intruder
But do yourself a favour and don't watch any of the trailers or even look at the box art because, well, it's might spoil things.
I bought the DVD under the foolish idea (helped by the box art) that Bruce Campbell starred and Sam Raimi was involved but not so much - Bruce is there for like a minute and Sam is a secondary character, not the director - but the movie's still fun and you get to see a grocery store from the late 1980s.