Monster Party is a pretty weird movie. Like, it starts off as a crime drama that suddenly takes a left turn into horror at about the halfway point. (And even knowing that it would, the turn is shocking in its suddenness.) But all of that would be fine and I could just call it riffing on the same themes as Ready or Not, just with a different set up.
Except that every aspect of the movie is just deeply nihilistic and dark. Going into why would be way more spoiler-laden than the already inevitable spoilers I have provided, but in retrospect, geeze. Recommended for people who like their movies like they like their coffee: blacker than the blackest depths of their empty souls.
 Which I briefly mistook for Hide and Seek, a movie about which I had completely forgotten and even now remember almost nothing, but which via downstream links on my review have lead me down a rabbit hole of old creepy internet stories for the past half hour, and selected my next movie for me.