emulator: Sudachi
type: standalone
core_classification: community_fork
source: "https://github.com/emuplace/sudachi.emuplace.app"
upstream_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."
profiled_date: "2026-10-20"
source_commit: "c7431bd420d66c54df277ba0a0b71de42cf0a5bf"
core_version: "1.0.15"
display_name: "Sudachi (Nintendo Switch)"
cores:
  - sudachi
systems: [nintendo-switch]
mode: standalone

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 (src/common/fs/fs_paths.h:8-9, 18). On Windows the portable
  build uses a user folder next to sudachi.exe when it exists, otherwise
  %APPDATA%/sudachi (src/common/fs/path_util.cpp:90-96, CMakeLists.txt:68).
  RetroBat creates that user folder 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:
  - name: "prod.keys"
    required: true
    path: "switch/prod.keys"
    note: "Production keys for NCA decryption (master, key area, header, titlekek)"
    source_ref: "src/core/crypto/key_manager.cpp:660-661"

  - name: "dev.keys"
    required: false
    path: "switch/dev.keys"
    note: "Development-unit keys, read instead of prod.keys when use_dev_keys is set"
    source_ref: "src/core/crypto/key_manager.cpp:654-657"

  - name: "title.keys"
    required: false
    path: "switch/title.keys"
    note: "Per-title encryption keys (rights_id to titlekey mappings)"
    source_ref: "src/core/crypto/key_manager.cpp:664-665"

  - name: "console.keys"
    required: false
    path: "switch/console.keys"
    note: "Console-specific keys (BIS, SD seed)"
    source_ref: "src/core/crypto/key_manager.cpp:666-667"

  - name: "key_retail.bin"
    required: false
    path: "switch/key_retail.bin"
    size: 160
    note: "Amiibo decryption keys (two InternalKey structs, 0x50 bytes each)"
    source_ref: "src/core/hle/service/nfc/common/amiibo_crypto.cpp:273-295"