> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# PlayFab Services for GDK

> Compare PlayFab Services SDK options for the Microsoft GDK on XBOX and Windows: C/C++, Unreal, Unity, and Legacy C++ with quickstart links.

The following SDKs are available for game client development on Windows and XBOX with the GDK. The right SDK depends mostly on your choice of game engine.

| PlayFab SDK | Description | Learn More |
| - | - | - |
| C/C++ | Newest SDK featuring a portable C interface and granting full control of memory and threading to the game developer. Intended for integration into high performance game engines. | [C/C++ GDK Quickstart](https://docs.xbox.com/services/playfab/sdks/c/quickstart-gdk.md) |
| Unreal | An Unreal Engine marketplace plugin designed for use with either C++ or blueprint. | [Unreal SDK Overview](https://docs.xbox.com/services/playfab/sdks/unreal.md) |
| Unity | Both an editor extension and stand-alone SDK for Unity3d. | [Unity SDK Overview](https://docs.xbox.com/services/playfab/sdks/unity3d.md) |
| Legacy C++ | Our older cross-platform C++ SDK supports a simple REST-like interface with PlayFab across multiple platforms. | [Legacy C++ Overview](https://docs.xbox.com/services/playfab/sdks/playfab-cpp.md) |


## Related topics

- [PlayFab Services SDK](https://docs.xbox.com/services/playfab/sdks/c/index.md)
- [PlayFab integration for XBOX services titles](https://docs.xbox.com/services/xbox-services/playfab-integration.md)
- [PlayFab Services C API reference](https://docs.xbox.com/services/playfab/api-references/c/index.md)
- [Legacy C++ PlayFab SDK](https://docs.xbox.com/services/playfab/sdks/playfab-cpp/index.md)
- [Add backend services with PlayFab](https://docs.xbox.com/home/build-first-title/add-backend-services.md)