Anyone ever play The Whispering Vault? Early to kid 90s horror type game. I own the books and read them ages ago but never found a group to run it with. Players are stalkers who were once human and are now hunters of the evil supernatural creatures.
Never heard of it, but it sounds like
Nightbane. Neat.
Speaking of, there were a bunch of "play as the monsters" type games in the 90s.
WitchCraft,
Everlasting,
Nephilim,
War of Ages,
Invisible War...
World of Darkness outcompeted them all, though not for any special strength of the rules or setting. What I never liked about WoD was/is that it focuses more on advancing its comic book-style GMPC-ridden canon setting rather than giving groups tools to build their own settings and tell their own stories. At least
Nephilim allowed the PCs to directly engage with the lore by allowing you to play as historical figures using the past life mechanic, and its use of magic-hunting human secret societies as the main antagonists (rather than vampire illuminati or whathaveyou) was quite refreshing when other games treated humans as cattle at best.
Night's Black Agents is an amazing example of how you can design a toolkit that provides extensive guidelines for building your own vampire hunting agency and vampire conspiracies from the ground up. It doesn't unhelpfully tell you that "you can build your own setting," it actually shows you
how with huge lists of features, flowcharts, and practical examples. If you're building any kind of toolkit, then it's a great example of how.