The system's internal security checks cannot verify the digital signature of the game file. This usually happens after a system firmware update.

If you are looking for physical or digital versions of the game, it is widely available at major retailers: Official Digital Version : Available for Nintendo eShop Physical Editions offers the standard version for lists a bundle including the Nintendo Switch 2 system and the game for has physical copies in stock for at select locations like Format & Compatibility Notes XCI/NSZ Files

: A 3D platformer featuring a heavy focus on terrain destruction, allowing players to smash through walls and carve tunnels. Co-op Features : Supports 2-player co-op where the second player controls , using her "sonic vocals" to assist DK. Acquisition Options

To ensure you have the latest fixes and features, you can manually update your software via the Internet through the Nintendo Support menu.

In the context of Switch gaming and digital backups, these file extensions refer to how the game data is packaged:

If you prefer a plug-and-play experience, the XCI format is ideal. Because it mimics a physical game cartridge, many custom firmware solutions allow you to mount and play the game directly from an external drive or your SD card without undergoing a lengthy installation process. Why Choose the NSZ Format?