Game Patcher 3DS

Game Patcher

Game Patcher is a small program to simplify the workflow of patching CIA and 3DS files.

It uses the following tools:

• xdelta (v3.1.0)
• 3dstool (v1.1.0)
• ctrtool (v0.7)
• makerom (v0.17)

Using Game Patcher

You can download the newest version as an executable from the Release Page. Extract the archive and copy GamePatcher.exe to the directory containing the dumped CIA or 3DS file of your game and the patches as a zip archive and run it.

It supports regular CIAs, update CIAs and 3DS files and tries to automatically determine which .zip patches should be used to patch which .cia and .3ds games. The required tools are downloaded automatically.

At the end of the script you are asked whether you want to start the clean up.

• Choosing n will preserve all folders and tools and therefore speed up the next execution.
• Choosing y will delete all the folders created in the current execution.
• Choosing all will delete all folders in the current directory as well as all the downloaded tools.

You can supply the following command line arguments:

usage: GamePatcher [-h] [--mapping patch cia version] [--ignore-incompatible-patches] [--xdelta-url url]
                   [--3dstool-url url] [--ctrtool-url url] [--makerom-url url] [--romfs file] [--manual file]
                   [--download-play file] [--banner file] [--code file] [--icon file] [--logo file] [--plain file]
                   [--ex-header file] [--header0 file] [--header1 file] [--header2 file]

optional arguments:
  -h, --help            show this help message and exit
  --mapping patch game version
                        Defines which patch file should be used to patch which game file. Can be used multiple times.
                        When patching a CIA file specify the version as a string (v1.0.0) or integer (1024). When
                        patching a 3DS file the version will be ignored.
  --ignore-incompatible-patches
                        Continue patching when a patch cannot be applied instead of stopping the process.
  --xdelta-url url      The direct download link to xdelta. Supported file types are zip and exe.
  --3dstool-url url     The direct download link to 3dstool. Supported file types are zip and exe.
  --ctrtool-url url     The direct download link to ctrtool. Supported file types are zip and exe.
  --makerom-url url     The direct download link to makerom. Supported file types are zip and exe.
  --romfs file          The name of the patch file for DecryptedRomFS.bin
  --manual file         The name of the patch file for DecryptedManual.bin
  --download-play file  The name of the patch file for DecryptedDownloadPlay.bin
  --banner file         The name of the patch file for banner.bin
  --code file           The name of the patch file for code.bin
  --icon file           The name of the patch file for icon.bin
  --logo file           The name of the patch file for LogoLZ.bin
  --plain file          The name of the patch file for LogoLZ.bin
  --ex-header file      The name of the patch file for DecryptedExHeader.bin
  --header0 file        The name of the patch file for HeaderNCCH0.bin
  --header1 file        The name of the patch file for HeaderNCCH1.bin
  --header2 file        The name of the patch file for HeaderNCCH2.bin

For Developers

Setup

This program is written using Python 3.8.

Running

You can run the program by using the command python GamePatcher.py.

Distributing

To pack the program into a single executable file, pyinstaller is needed. Simply run the command pyinstaller GamePatcher.spec --noconfirm and the executable will be created in the dist folder.