> For the complete documentation index, see [llms.txt](https://cesium.gitbook.io/cesium-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cesium.gitbook.io/cesium-docs/getting-started/load-cesium.md).

# Load Cesium into a running game

Open Minecraft first, then tell the launcher to load Cesium into it.

Open Minecraft first, then tell the launcher to load Cesium into it.

## The order matters

Cesium attaches to a Minecraft instance that is already running. It does not start Minecraft for you and it does not change your Minecraft installation.

{% stepper %}
{% step %}
Start Minecraft the way you always do and wait until you reach the main menu.
{% endstep %}

{% step %}
Open the Cesium Launcher and sign in if you are not already.
{% endstep %}

{% step %}
On the home screen, check the status. When Minecraft is detected, the Load Cesium button is active. If you see No instance running, the launcher has not found a game yet. See [The launcher says no instance running](/cesium-docs/support/no-instance-running.md).
{% endstep %}

{% step %}
Click Load Cesium.
{% endstep %}
{% endstepper %}

## What the launcher shows once loaded

* Session info: the instance it attached to, how many modules are active, memory use, the process, the client build, and the launcher version.
* Session activity: a live activity chart for the current session.
* Client timeline: the most recent module changes, so you can see what you turned on and off and when.

## Loading again

If you close Minecraft, Cesium closes with it. Start Minecraft again and click Load Cesium again. You do not need to reinstall anything.

## Next

[Open the ClickGUI and bind keys](/cesium-docs/getting-started/clickgui-and-keybinds.md).


---

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