There’s a (likely apocryphal) story about a country tracking subjects inside the pentagon, and being completely convinced that one building near the center was absolutely the most important in the complex. Every single head of staff, general, admiral, etc would visit the building for 10-20 minutes at a time, so it must be some major communication hub. They devised plans to infiltrate this building, to see what was inside.
It was the coffee shop.
There’s also Curse of the Moon, which is an homage to the original 8-bit games. It’s not a modern metroidvania, but if you like the older pre-SOTN Castlevania games then you should check them out.