I was going to write a review, but I've been having sleepless nights and I can't find words to do NEKROPOL justice.
It's great. You could use it with pretty much any game, though I could see plugging it straight into a game of the most recent edition of a certain d20-based game with practically no adaptations.
Aesthetics 5/5. Writing 5/5. Vibe 5/5.
Want an interesting addition to any campaign? Wish you were playing something with wonderful grit and dark style? NEKROPOL will do that.