The term NSP refers to the digital file format used by the Nintendo Switch for games and DLC. When players discuss Hades in this context, they are usually focusing on the digital version available via the Nintendo eShop.
The primary technical "deep feature" for on the Nintendo Switch (specifically in the context of the Nintendo Switch 2 platform) is the 120 frames per second (FPS) performance mode and enhanced high-definition visuals. hades nsp