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RetroBIOS

Sudachi

Sudachi emulates Nintendo Switch. It reads 5 files, 1 of them required: without a required file it does not start games.

The app reads its files from this folder:

%APPDATA%/sudachi/keys/

A user folder beside sudachi.exe is used instead when it exists.

Source: src/common/fs/path_util.cpp:90-96, CMakeLists.txt:68
About this profile
Detail Value
Type standalone
Classification Community fork
Source https://github.com/emuplace/sudachi.emuplace.app
Source status gone: The emuplace GitHub account answers 404 and sudachi.emuplace.app no longer serves. The 1.0.15 source archive (latest.zip, sha256 e2b98c4c2670407342db9f37feb6d2d5af39ff58acf42bbb348010fd8dc23f89) is kept by the Wayback Machine at its release URL, and its zip comment names the commit below. Observed 2026-10-20.
Version 1.0.15
Revision emuplace/sudachi.emuplace.app@c7431bd420d6
Profiled 2026-10-20
Profile YAML, JSON
Cores sudachi
Systems Nintendo Switch
Data folder (Windows) %APPDATA%/sudachi/
Data folder (macOS) $XDG_DATA_HOME/sudachi/, else ~/.local/share/sudachi/
Data folder (Linux) $XDG_DATA_HOME/sudachi/, else ~/.local/share/sudachi/
Data folder (Android) Android/data/org.sudachi.sudachi_emu/files/
Install this emulator's files

With RetroBat: the installer finds RetroBat and its BIOS folder, then downloads only the files Sudachi reads there and checks each one.

Open the Start menu. Type PowerShell and open it. Paste the line. Press Enter.

PowerShell
&([scriptblock]::Create((irm https://raw.githubusercontent.com/Abdess/retrobios/main/install.ps1))) --emulator sudachi
Technical notes

Sudachi is a standalone Nintendo Switch emulator forked from yuzu early access 4176 (README.md:1-4). Keys are read from the keys directory of the user data directory named in the data folder (src/common/fs/fs_paths.h:8-9, 18). RetroBat creates the user folder beside sudachi.exe before launching sudachi.exe -g <rom> and never copies keys itself. Key loading stops when neither prod.keys nor title.keys exists (src/core/crypto/key_manager.cpp:649-652). Firmware (system NCAs) is installed through the UI (Tools, Install Firmware, src/sudachi/main.cpp:4130), not read as loose files. Commercial games need the keys. Homebrew (.nro, .nso) runs without keys or firmware.

Files

Section titled “Files”

5 files: 1 required, 4 optional.

In this collection: 5 in repo and 0 missing.

Required

Section titled “Required”

prod.keys required in repo

  • Production keys for NCA decryption (master, key area, header, titlekek)

Optional

Section titled “Optional”

dev.keys optional in repo

  • Development-unit keys, read instead of prod.keys when use_dev_keys is set

title.keys optional in repo

  • Per-title encryption keys (rights_id to titlekey mappings)

console.keys optional in repo

  • Console-specific keys (BIS, SD seed)

key_retail.bin optional in repo

  • Amiibo decryption keys (two InternalKey structs, 0x50 bytes each)

Next steps

Section titled “Next steps”
.

Maintained by Abdess on GitHub. Report a problem.

Packs from release v2026.10.10, .

MIT for the tooling and metadata. BIOS and firmware files are third-party system software, preserved for personal backup, archival and interoperability.