# GameClass.server_onRestart

Challenge Mode only!

**Kind:** Callback

**Environments:** Game

## Game

**Callback side:** Server

``` { .lua .api-signature }
GameClass:server_onRestart(  )
```

[Open the full Game reference](../Game-Script-Environment/Classes/GameClass.md#server_onrestart)

Called when the user wants to restart the challenge level.

**Parameters:**

| Name | Type | Description |
| --- | --- | --- |
| `self` | table | The class instance. |