(Nintendo Switch Package) is the file format used for games and updates. What is the 2.0 Update? Released as the final major free content update for New Horizons

Thus, "Animal Crossing 20 NSP" refers to the digital package file for Animal Crossing: New Horizons (base game, typically version 1.0 or the complete 2.0 update), intended for use on custom firmware (CFW) or emulators like Ryujinx or Yuzu.

Q: Is there a difference between Animal Crossing NSP and XCI?
A: Yes. XCI is a cartridge dump (ready to boot), while NSP is an eShop package (requires installation). For emulators, both work. For CFW, NSPs must be installed to the NAND or SD card.

Safety Risks:

How Do I Update Animal Crossing on Atmosphere? : r/SwitchPirates

The 2.0 update shifted the game from a simple island getaway into a deeply customizable life simulator. The Roost & Brewster

in NSP format, you are likely trying to update a version of the game on a modded console or an emulator like Ryujinx or Yuzu.

coincided with unprecedented global stay-at-home orders. According to research from De Gruyter Brill