> ## Documentation Index
> Fetch the complete documentation index at: https://docs.launcherforge.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Unreal Engine

> Install and configure Launcher Forge authentication in Unreal Engine.

# Unreal Engine

Document:

* Plugin installation.
* Supported versions.
* Game Instance configuration.
* Launch-token reading.
* Available player data.
* Blueprint usage.
* C++ usage.
* Shipping builds.
* Frequent errors.

Launcher Forge starts the game with:

```text theme={null}
MyGame.exe --launchToken=TOKEN
```

Keep the recommended `0.5` second startup delay before validation.

<Warning>
  Shipping builds must not expose Token Override or raw tokens.
</Warning>

<Frame caption="Plugin setup and Game Instance authentication flow">
  <img src="https://mintcdn.com/launcher-forge/bI18S_IAtXIDvEcC/images/screenshots/unreal-engine.png?fit=max&auto=format&n=bI18S_IAtXIDvEcC&q=85&s=c1c4fb531392f4f7387168982659f425" alt="Unreal Engine Launcher Forge integration" width="1600" height="900" data-path="images/screenshots/unreal-engine.png" />
</Frame>