# World Simulators

World Simulators are started and shut down with the World. They can be enabled and assigned in the *Worlds* section of the *Developer Portal*.

World simulation servers are started with the command line parameters described in the [Simulators](https://docs.coherence.io/1.1/coherence-sdk-for-unity/simulation-server/..#command-line-parameters-in-the-cloud) section.

![](https://content.gitbook.com/content/4xmLLczbgaGVeoF6vews/blobs/AoTTPXqiUSlP0vvyq7Xg/image.png)