# RigidbodySleepMode2D

> Settings for a Rigidbody2D's initial sleep state.

## Definition

* **Type:** Enum
* **Namespace:** [UnityEngine](/engine/6000.3/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public enum RigidbodySleepMode2D
```

## Fields

| Value                                                                                          | Description                             |
| ---------------------------------------------------------------------------------------------- | --------------------------------------- |
| [NeverSleep](/engine/6000.3/script-reference/unityengine/rigidbodysleepmode2d/neversleep.md)   | Rigidbody2D never automatically sleeps. |
| [StartAsleep](/engine/6000.3/script-reference/unityengine/rigidbodysleepmode2d/startasleep.md) | Rigidbody2D is initially asleep.        |
| [StartAwake](/engine/6000.3/script-reference/unityengine/rigidbodysleepmode2d/startawake.md)   | Rigidbody2D is initially awake.         |