https://en.wikipedia.org/wiki/Immortal:_The_Invisible_War
https://rpggeek.com/rpg/1774/immortal-the-invisible-war-1st-edition
It’s a hot mess out of the box, but the core mechanics make good bones, and they integrate the rules into the lore in a way that makes metagaming hard (Or in character, anyways, for example at high perception, you can actually see stats)



2026: it did end, the transition to hell was subtle, but I see it now.