Since I don't see it mentioned, there is CoC d20, which is a very simple set of rules but does do modern and supernatural both pretty well. Of course, you have to be willing to watch your PCs go insane.
Since I don't see it mentioned, there is CoC d20, which is a very simple set of rules but does do modern and supernatural both pretty well. Of course, you have to be willing to watch your PCs go insane.