# 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/1.0/coherence-sdk-for-unity/simulation-server/..#command-line-parameters-in-the-cloud) section.

![](https://352971571-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOnNWMLfYsbCzCnIbNrcP%2Fuploads%2FsL0GQYPvElkaCe85zi2b%2Fimage.png?alt=media)