> ## 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.

# Concepts

> Reference and concepts for multiplayer sessions and matchmaking in the XBOX Game Development Kit (XBOX Services). Includes concepts and API guidance.

Explore concepts topics for XBOX game development.

> **[Configuring the multiplayer service](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-configure-the-multiplayer-service.md)**
>
> This topic describes how to configure the Multiplayer service, which includes configuring session templates, SmartMatch hoppers, and custom…

> **[Cross-network multiplayer](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-console-xr007-mmo-example.md)**
>
> This topic describes cross-network functionality and flow in a massive multiplayer online (MMO) game.

> **[Cross-network multiplayer](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-console-xr007-multiplayer-example.md)**
>
> This topic describes an example scenario that demonstrates cross-network functionality and flow in a traditional multiplayer online battle…

> **[Introduction to calling the multiplayer](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-intro-calling-mp-directly.md)**
>
> 2015 Multiplayer optimizes the direct use of Multiplayer Session Directory (MPSD) and game sessions.

> **[Migrating an arbiter](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-migrating-an-arbiter.md)**
>
> During a 2015 Multiplayer session, you might need to select a new arbiter by using arbiter migration.

> **[Multiplayer concepts](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-multiplayer-concepts-nav.md)**
>
> This section describes how to configure and implement XBOX services Multiplayer services.

> **[Multiplayer concepts](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-multiplayer-concepts.md)**
>
> The Multiplayer system includes a multiplayer session, Multiplayer Session Directory (MPSD), SmartMatch matchmaking, and Quality of Service…

> **[Multiplayer roles](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-multiplayer-roles.md)**
>
> This topic describes how to define player roles in XBOX services multiplayer.

> **[Multiplayer session browse](https://docs.xbox.com/services/xbox-services/multiplayer/concepts/live-session-browse.md)**
>
> Use this topic to enable your title for users to query a list of open multiplayer game sessions that meet their specified criteria by using…

## See also

* [Chat](https://docs.xbox.com/services/xbox-services/multiplayer/chat/index.md)
* [Invites](https://docs.xbox.com/services/xbox-services/multiplayer/invites/index.md)
* [Matchmaking](https://docs.xbox.com/services/xbox-services/multiplayer/matchmaking/index.md)
* [Mpa](https://docs.xbox.com/services/xbox-services/multiplayer/mpa/index.md)
* [Mpm](https://docs.xbox.com/services/xbox-services/multiplayer/mpm/index.md)
* [Mpsd](https://docs.xbox.com/services/xbox-services/multiplayer/mpsd/index.md)
* [Overviews](https://docs.xbox.com/services/xbox-services/multiplayer/overviews/index.md)


## Related topics

- [Concepts](https://docs.xbox.com/services/xbox-services/multiplayer/invites/concepts/index.md)