vectorcmdr/NMSE

NMSE (NO MAN'S SAVE EDITOR) - Open source save editor for No Man's Sky, boasting the most complete editing features among save editors.

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nmse.vectorcmdr.xyz

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README

NMSE (No Man's Save Editor)

NMSE is a free, open-source desktop application for editing No Man's Sky save files.
It boasts the most complete set of editable features among editors and supports every platform the game ships on;
Steam, GOG, Xbox Game Pass, PlayStation 4 & Nintendo Switch.

Download Latest Release · See The Website · Report a Bug · Request a Feature
User Guide

The user guide may lag behind builds.

Latest Supported Game Version: 6.45.1 The Swarm

✨ Features Summary

👨‍🚀 Player & Stats

Edit health, currency, units, nanites, quicksilver
Switch game mode and difficulty presets
Modify player state and galactic coordinates
Unlock words, glyphs, and discoveries
Full milestone and journey milestone editing
Edit multi-tool inventory, type, class, and seed
Edit known items (product, tech, recipes, etc.)
Outfit export/import

🏗️ Bases, Settlements

Edit base inventories and storage chests
Settlement stats, production, and perks
Edit corvette cache and salvage containers
Edit fishing inventories and cooking ingredients

🦎 Companion Pets

Companion editing
Custom creature builder
Pet battle editing

🚀 Starships, Exocraft & Fleets

Edit starships with full inventory access
Change ship type, class, seed, and name
Corvette editing, part reverse lookup, export and import
Manage exocraft inventories and tech
Full freighter inventory editing and room listing
Manage frigate fleet stats and traits
Squadron pilot and ship editing

🗃️ Inventories & More

Visual inventory grid editor for every slot type
Drag-and-drop item management
Auto-stack items from exosuit/starship to freighter/chests/starship
Sort inventory
Import/export practically everything (cross-editor compatible)
ByteBeat music library editor
Recipe browser with full crafting trees
Raw JSON tree viewer for advanced editing
Export/import editor configuration profiles
Light/Dark mode

For a full breakdown of all of the features, refer to the User Guide

🌍 Multi-Language Support

NMSE is localised in 16 languages: English (UK), English (US), French, Italian, German, Spanish, Russian, Polish, Dutch, Portuguese, Latin American Spanish, Brazilian Portuguese, Simplified Chinese, Traditional Chinese, Japanese and Korean. Any help in making language support more natural is welcome!

🗺️ Roadmap

You can view the NMSE development roadmap here for upcoming, planned and dreamt about features.

📸 Screenshots

Player	Inventories	Corvettes	Companions

Fleet	Catalogue	JSON Editor	Localisation

📥 Installation

Windows: Quick Start

Download the latest release from the Releases page
Extract the zip to a folder of your choice
Run NMSE.exe
Select your save slot and click Load
If you save location is not auto-detected; use the Browse... button or File > Open Save Directory to locate your save directory

💡 Tip: NMSE auto-detects your save file location for Steam, GOG, and Xbox Game Pass

Linux & macOS:

Wine based AppImage and DMG are available from the release page.
See the cross-platform guides for running NMSE via Wine:

🐧 Linux AppImage with WINE included (RECOMMENDED)
🥃 Gcenx Wine Builds on macOS
✖️CrossOver on macOS
Advanced usage under Linux: 🍷 Wine on Linux or🧴 Bottles on Linux

A native cross-platform version is planned.

📖 Documentation

User Guide - How to use NMSE panel by panel, feature by feature
Developer Docs - Architecture, core logic, data layer, IO, models, and UI internals
Contributing - How to contribute code, report bugs, and submit pull requests
Code of Conduct - Community guidelines
Support - How to get help

📄 License

NMSE is licensed under the GNU Affero General Public License - see the LICENSE file for details.

🛠️ Building from Source

# Clone the repository
git clone https://github.com/vectorcmdr/NMSE.git
cd NMSE

# Restore and build
dotnet restore
dotnet build

# Run tests
dotnet test NMSE.Tests/
dotnet test NMSE.Extractor.Tests/

Requires: .NET 10.0 SDK · Windows or cross-compilation via EnableWindowsTargeting

💖 Support the Project

If NMSE has been useful to you, please consider supporting its development:

Your support helps cover hosting, tooling, and the many hours of development and testing that go into each release.
Every contribution - big or small - is greatly appreciated. ❤️

Public Sponsors:

Thanks to these users for their generous support:

sponsors badge

🤝 Acknowledgements

Hello Games for creating No Man's Sky
The NMS modding and save editing community
All contributors and sponsors who help make NMSE better

Contributors:

contributors badge

Made with ❤️ by vectorcmdr

Contributors

382 commits

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