Once installation is complete, launch the game from the home menu. Notes Requires the base game installed to function.
This archive contains the latest update for on the Nintendo Switch. This update ensures compatibility with the latest system firmware and addresses various bug fixes and performance improvements to provide the best underground experience. Installation Instructions Undertale-NSP-UPDATE-ROMSLAB.rar
Use a tool like WinRAR or 7-Zip to extract the .nsp file from the .rar archive. Once installation is complete, launch the game from
Move the extracted .nsp file to your Switch's SD card. Once installation is complete
Use your preferred title manager (such as Tinfoil, DBI, or Goldleaf) to install the update.