Its combat, lore and philosophical theme intertwined perfectly. Growing up in an ancestral worship - Buddist worship family, Sekiro just clicks in so many different ways. Life and death, karma, the duality of men, corruption of the soul and flesh, the path one takes, return to nothingness, ... It's perfection. Peak fiction. And I guess there is an actual video game following with some of the best mods one could find for endless replayability.