"Bloodstained: Ritual of the Night" is a 2019 action-adventure game developed and published by 505 Games. The game is a spiritual successor to the "Castlevania: Symphony of the Night" series and was primarily developed by Koji Igarashi, who is known for his work on the "Castlevania" series.
The NSP file format is commonly associated with Nintendo Switch game files. If you're looking to download or purchase "Bloodstained: Ritual of the Night" for the Switch, ensure you're obtaining it from legitimate sources, such as the Nintendo eShop, to support the developers and to avoid potential malware.