# Multiplayer Services SDK

> Create and manage multiplayer experiences using Unity's integrated suite of services.

Unity Multiplayer Services provides a comprehensive framework for building multiplayer games, offering solutions for networking, server hosting, and player connections.

The Multiplayer Services (MPS) SDK unifies Lobby, Matchmaker, and Relay under a single, cohesive API, replacing their individual SDKs. This consolidated approach reduces development complexity while maintaining the full capabilities of Unity's multiplayer infrastructure.

> **Note:**
>
> Existing games already using Lobby, Matchmaker, or Relay can be upgraded to the Multiplayer Services SDK by following [the upgrade guide](./migration-path.md).

The MPS SDK introduces [sessions](./use-sessions-toc.md), which isn't a standalone service but instead an abstraction layer that manages how players connect and interact in multiplayer games. Sessions handle the complexities of player grouping, connection management, and game state coordination, streamlining the development of both peer-to-peer games and dedicated server experiences.

[Multiplayer sessions](/mps-sdk/sessions.md): Implement multiplayer functionality in your games using sessions, a unified system that manages player connections and interactions.
[Install and upgrade](/mps-sdk/install-and-upgrade.md): Install the Multiplayer Services package, and upgrade any individual services' SDKs to the unified Multiplayer Services SDK.
[Get started](/mps-sdk/get-started.md): Learn the different methods to add sessions-based multiplayer functionality to your game.
[Sessions tutorials with Unity Netcode](/mps-sdk/build-sessions-landing.md): Create simple multiplayer games using Unity Netcode solutions to learn key concepts, such as sessions and how to join them.
[Integrating Multiplayer Sessions in your game](/mps-sdk/sessions.md): Learn about different ways to configure a multiplayer game programmatically.
[Migrate to the Multiplayer Services SDK](/mps-sdk/migration-path.md): Learn how to migrate from using individual UGS SDKs to the unified Multiplayer Services SDK.
[Deploying Multiplayer configurations](/mps-sdk/deployment/deployment-window-integration.md): Learn about the configuration items provided by the Multiplayer Services SDK, and how to use the **Deployment** window to deploy them directly from the Unity Editor.
[Reference](/mps-sdk/reference.md): Learn about any related foundational information.