Easy To Use Command Line Modding Utility For Unreal Engine Games 4.0-5.7
Automates creation, and placement, of mod archives, and other various actions.

• Supports Unreal Engine versions: 4.0-5.7
• Supports loose file modding (unreal assets, not in a mod archive, like a .pak)
• Supports modding iostore games
• Automatic mod creation and placement
• Automatic engine cooking, and packaging
• Automatic game running
• Automatic editor running
• Event management system
• Process management events
• Window management events
• Automatic script/exec running events
• Supports creation of mod archives, through unreal_pak, repak, and engine made archives
• Ability to add launch params to various script/exec running
• Supports games with alternative packing structures (example game: Kingdom Hearts 3)
• Supports packing edited files, through the persistent_files dir, or through the Event Management System
• Easily configure what files end up in your final mod(s) and how with the Mod list within the config
• Supports loading from json file, so you can have multiple projects easily
• Logging
• Colorful printouts
• Ability to run in the background, with no windows
• And more...

Tempo is distributed as a single package, tempo-cli, which relies on tempo-core.

# With pip.
pip install git+https://www.github.com/tempo-cli

# Or pipx.
pipx install git+https://www.github.com/tempo-cli

# Or uv.
uv add git+https://www.github.com/tempo-cli

If you prefer prebuilt executables, downloads are available for Windows and Linux in the Releases section:

• Windows: tempo_cli.exe
• Linux: tempo_cli

For a step-by-step guide on setting up and using tempo-cli, check out the Getting Started Guide.

tempo-cli's documentation is available at tempo-organization.github.io/tempo-cli.

Additionally, the command line reference documentation can be viewed with tempo_cli --help.

If you encounter a bug or issue, please submit a report on the issues page.
When creating an issue, please provide as much information as possible, including:

• Steps to reproduce the issue
• What you expect to happen, versus what is happening
• Any error messages or logs
• Your system operating system

Contributions are always appreciated, but please keep in mind the following:

• Before coding new features, try to make an issue to see if the idea/implementation needs any tweaking, or is out of scope
• Make sure your changes pass all pre-commit checks

Currently we support Windows (x86-64 and i686) and Linux (x86-64 and aarch64).

Yes, the license fully allows this, and we would love to see it.

tempo-cli relies on these tools from the community to provide it's full functionality.

• Jmap - Unreal Engine reflection data format and extractor
• Repak - Unreal Engine .pak file library and CLI in rust
• Retoc - Unreal Engine IoStore CLI packing/unpacking tool
• UE4SS - Injectable LUA scripting system, SDK generator, live property editor and other dumping utilities for UE4/5 games
• Patternsleuth - Unreal Engine address scanner and test suite
• Umodel - Viewer and exporter for Unreal Engine 1-4 assets (UE Viewer)
• Stove - an editor for cooked unreal engine 4/5 maps
• Spaghetti - a function hooker for cooked unreal engine blueprints
• Fmodel - Unreal Engine Archives Explorer
• Kismet Analyzer - Unreal Engine blueprint/kismet script reverse engineering and modding utilities
• UAssetGUI - A tool designed for low-level examination and modification of Unreal Engine game assets by hand
• Suzie - Unreal Engine Editor runtime class generation from dumped game reflection data
• Commitizen - Create committing rules for projects, auto bump versions, and auto changelog generation

tempo-cli is licensed under

• GNU General Public License version 3 (LICENSE or https://opensource.org/license/gpl-3-0)

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in tempo-cli
by you, as defined in the GNU General Public License version 3, shall be licensed as above, without any
additional terms or conditions.