Installing a corrupted or malicious NSP can lead to a "black screen of death," making the Switch unbootable without a NAND backup.
If you did manage to find a legitimate NSP, 2021 required specific updates to make the games playable:
The search for a reflected the broader "cat and mouse" game between Nintendo and the homebrew community. While the files exist, the difficulty in obtaining them safely—and the technical hurdles of keeping your CFW updated—made it a year where "direct downloads" mostly gave way to private shops and community-driven repositories.
As always, NSPs are a one-way ticket to a Nintendo Account ban if you connect to the internet. In 2021, Nintendo’s telemetry became even more sophisticated at detecting "dirty" NANDs. Optimization and Updates
They often include the base game, all previous updates, and DLC.
If you were searching for "Hyrule Warriors NSP" in 2021, you likely noticed that many of the "old reliable" sites vanished or became riddled with broken links. Several factors contributed to this:
Both Hyrule Warriors titles on Switch are known for frame rate dips. The 2021 homebrew scene saw many "OC" (Overclock) profiles released specifically to help these games maintain a steady 30 or 60 FPS.
Here is a comprehensive look at the state of Hyrule Warriors NSPs, the risks involved, and why 2021 was a turning point for the scene. The Appeal of the NSP Format
Age of Calamity and its DLC required newer firmware versions (12.0.0+). Users had to ensure their CFW (Atmosphère) was updated before attempting to install.