I felt the need to add my say in City of Blood after reading nothing but bad reviews here on IMDb. And everywhere else.
There's a political message, and it is pretty much drama for a good part of the middle hour, and as a slasher fan I was worried about finally watching this. However, with a strong "2000 years ago" opening and some modern day killings with a unique slasher disguise & weaponry choices, I was satisfied with what it offered me in the sub-genre. Perhaps this is because I have seen most (and I do mean MOST) of the slasher films from the 70s and 80s, and after seeing some of the absolute worst those decades had to offer (oddly enough, not as bad as the new millennium stuff) I've been ready for City of Blood for a long time. The story is strong and if you care about more than just deaths in these types of films, you could be pleasantly surprised.
Think of this as a political cop-thriller with slasher elements rather than a slasher with a theme. I welcome it to the family, but just make sure not to expect something you're not ready for. A party film... this is not.