Potentially interesting idea if you can actually figure out what the idea was but with execrable acting , dreadful fight scenes, laugh-a-minute dialogue and the usual constant foul language which I feel these days is incredibly sad and denigrates all the old movies of the past that did not need to use it, combined with poor special effects quickly put paid to that notion!
Film fell apart quite quickly and I began that "clock watching - when is it finishing scenario" after they started repeating the same interminably boring action sequence over and over again for over 2 hours...yes two hours of your life you will never get back.
I read the reviews first and a "Promising first 10 minutes" was a bit generous and out by around 9 minutes!
Barely a horror film, in fact barely a film at all it was that boring and tedious watching some of the worst acting ever put to celluloid...or was it a cheapo Xiaomi handy-cam? hard to be sure with the constant blue filter used to mask some of the poor scenery and effects!
The film looks like it was partly shot on a field in the middle of Milton Keynes with a couple of old army vehicles borrowed from the local scrapyard and inside the stairwell of a block of flats in Peckham - sadly Del Boy and Rodney did not turn up in their three wheeler to alleviate the boredom!
The fact the movie cannot be found on going under its name as I am watching it on the horror channel of "The Ascent" also makes me scratch my head; even more so when I do another search and up comes the Imdb page with a Dvd cover under the name "BLACK OPS" or under Amazon as Legacy - Black Ops but the name of the movie on Imdb is the highly original "STAIRS" makes me shake my head even more. It is as if they were looking for the best clickbait title they could find that would hoodwink the unfortunate punter...sadly none worked!
As always I did hang in until the end....unfortunately!!! You would be better of just hanging yourself than watching this utter British drivel! Summary: Dreadful from first scene to the mind numbing last!