Astroneer Modding Documentation

This documentation website includes information and guides to help you make mods for the video game Astroneer, along with the standards that Astroneer mods should adhere to.

If you need help, feel free to check out the Astroneer Modding Discord server.

You can find a list of all mod managers that support Astroneer under Compatibility on the Metadata Standard page.

Formal standards can be found in the Modding standards section which includes the Metadata Standard and the Index File Standard.

If you want to learn how to actually make mods, check out the Making Mods section.

Note

This site is not affiliated with System Era in any way and is exclusively community-run. Also Astroneer has no official mod support and everything is community-built.

Contents:

• Modding standards
  • General Information
    • .pak Mod File Names
    • Index File Standard
    • Metadata Standard
• Making Mods
  • About Astroneer Modding
    • About Astroneer
    • Unreal Pak Files
    • Unreal Asset Files
    • File Structure and Paths
    • Tools For Creating Mods
    • Items in Astroneer
    • Getting Help
  • Setting up Modding Tools
    • Setting up Folders
    • Setting up repak
    • Extracting the Game Files
    • Setting up UAssetGUI
    • Opening an Asset
  • Basic Modding
    • How Making a Mod Works
    • Setting up Folders
    • Creating metadata.json File
    • Finding the Asset to modify
    • Modifying the Asset
    • Packing the Mod
    • Installing the Mod
    • Verifying the mod works
  • Setting Up the Modding Kit
    • Visual Studio
    • Unreal Engine 4
    • Modding Kit
    • Wwise (optional)
    • Generating Visual Studio project files (optional)
    • First-time Launch
    • Developing Mods
  • Adding Custom Items with the Unreal Editor
    • Creating the Mod Folder
    • Creating an Item
    • Cooking the Mod
    • Packaging the Mod
  • Picking Names
    • Naming is hard
    • Allowed Characters
    • What you need to choose
    • Author ID
    • Mod Name and ID
    • Mod ID extension
  • Adding Missions
    • Adding the Mission Trailhead
    • Adding Mission Trailhead to the Mod
  • Adding Mission Panels to Items
    • Creating the Mission Panel
    • Creating & Linking the Supply Drop Points
    • Result
  • Diegetic UI
    • Making Diegetic UI
    • Adding Control Panel to the item
  • Procedural Generation
    • Procedural Generation
    • Writing the metadata
  • Custom Routines
    • Custom Routines
    • Prerequisites
    • Setup
    • Advanced usage: ICustomRoutineAPI
    • Advanced usage: JSON
  • Frequently Asked Questions
    • General Questions
    • Game Asset Questions
    • Unreal Editor Questions
    • UE4SS Questions