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Ensure your console has the latest sigpatches installed. Without these, the Switch will fail to launch custom NSPs.
To "prepare" or install this content, follow these general steps for a modded Nintendo Switch: 1. Extract the Archive FUSER-NSP-ROMSLAB.rar
The .rar file is a container. Use a tool like or WinRAR to extract the contents. Ensure your console has the latest sigpatches installed
Place the .nsp file on your SD card, then use your installer of choice to "Install from SDMC". 3. Verification install the Base Game first
FUSER's official multiplayer servers were shut down in December 2022, so the single-player campaign and freestyle modes will be the primary functional components.
If the .rar contains multiple files, install the Base Game first, followed by any Updates and then DLC.