The NSP (Nintendo Switch Package) file is a format used for Switch games, and in this case, it includes the Premium Edition of Mortal Kombat 1, complete with all the DLC. By downloading the NSP file, you'll get access to the full game, without needing to purchase any additional content.
While the idea of finding "free" DLC or NSPs online is tempting, it carries significant risks for your console and your data: mortal kombat 1 premium edition switch nsp dlc free
The term "NSP" refers to Nintendo Submission Packages, the digital file format for Switch games. While some users look for "free" NSP versions of the game and its DLC, there are significant risks: How Do I Access My DLC or Add-on Content? The NSP (Nintendo Switch Package) file is a