# id

> The unique identifier of this achievement.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.SocialPlatforms](/engine/6000.6/script-reference/unityengine/socialplatforms.md)
* **Assembly:** UnityEngine.GameCenterModule

> **Warning:**
>
> **Deprecated.** IAchievement is deprecated and will be removed in a future release.

```csharp
string id { get; set; }
```