> For the complete documentation index, see [llms.txt](https://docs.coherence.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coherence.io/0.9/simulators/world-simulators.md).

# 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](/0.9/api-reference/simulation-server.md#command-line-parameters-in-the-cloud) section.

![](/files/fVxQMq1io5F5LtlZy2mM)