emulator: Yuzu
type: standalone
core_classification: official_port
source: "https://github.com/yuzu-emu-mirror/yuzu"
upstream: "https://github.com/yuzu-emu/yuzu"
profiled_date: "2026-03-26"
core_version: "EA 4176"
display_name: "Yuzu (Nintendo Switch)"
systems: [nintendo-switch]
analysis_date: "2026-03-26"
analysis_commit: "15e6e48 (yuzu-emu-mirror, depth=1)"
mode: standalone

# Yuzu is the original Nintendo Switch emulator by bunnei and the yuzu team.
# Legally shut down by Nintendo in March 2024. Citron, Suyu, Eden are community forks.
# Key files loaded from <data_dir>/keys/ (fs_paths.h:18, path_util.cpp:124).
# On Linux: $XDG_DATA_HOME/yuzu/keys/
# On Windows: %APPDATA%/yuzu/keys/
# Firmware NCAs are installed via UI (main.cpp:4160), not placed as files.
# HLE fallbacks exist for fonts, timezone, system version, mii model, ng word lists.
# Original repo DMCA'd by Nintendo. Analysis from community mirror (yuzu-emu-mirror).

files:
  - name: "prod.keys"
    required: true
    path: "switch/"
    mode: standalone
    note: "Production keys for NCA decryption (master, key area, header, titlekek)"
    source_ref: "src/core/crypto/key_manager.cpp:655-656"

  - name: "title.keys"
    required: false
    path: "switch/"
    mode: standalone
    note: "Per-title encryption keys (rights_id to titlekey mappings)"
    source_ref: "src/core/crypto/key_manager.cpp:659-660"

  - name: "console.keys"
    required: false
    path: "switch/"
    mode: standalone
    note: "Console-specific keys (BIS, SD seed)"
    source_ref: "src/core/crypto/key_manager.cpp:661-662"

  - name: "key_retail.bin"
    required: false
    path: "switch/"
    size: 160
    mode: standalone
    note: "Amiibo decryption keys (two InternalKey structs, 0x50 bytes each)"
    source_ref: "src/core/hle/service/nfc/common/amiibo_crypto.cpp:273-294"

notes: |
  Yuzu is the original standalone Nintendo Switch emulator, created by bunnei (author of Citra).
  Legally shut down by Nintendo in March 2024 via lawsuit settlement. Permanently frozen.
  dev.keys can be used instead of prod.keys when use_dev_keys is enabled (for Switch dev units).
  Firmware (system NCAs) must be installed through Yuzu's UI from a firmware directory.
  Required for commercial games. Homebrew (.nro, .nso) can run without keys or firmware.
  Community forks: Citron, Suyu, Eden. Original GitHub repos DMCA'd.