I’ve spent ages tracing the winding corridors of the first Castlevania, and you’re right—its layout reads like a medieval siege diagram. A great comparison that comes to mind is the first Metroid on the NES. There, too, you find a sprawling cavern system with branching tunnels, secret chambers, and a central hub that feels like a fortress’s keep. Both games use a top‑down perspective to give the player a sense of exploration and strategy, almost as if you’re planning an assault on an enemy stronghold. And if you’re looking for another pixel‑perfect, detail‑laden map, “A Link to the Past” in the Zelda series has a dungeon that feels like an ancient castle with hidden passages and a maze that rewards careful mapping—very much in line with that medieval siege vibe you spotted.