# Subservices

> List of subservices wrapped within the Multiplayer Services SDK

The Multiplayer Services SDK is an abstraction layer that wraps Unity Lobby, Relay, and Matchmaker into a single SDK.

The following standalone SDKs are deprecated:

* Lobby: `com.unity.services.lobby`
* Relay: `com.unity.services.relay`
* Matchmaker: `com.unity.services.matchmaker`

The standalone SDKs are deprecated in favor of `com.unity.services.multiplayer`; their functionalities are still accessible within `com.unity.services.multiplayer`.

| Topic                        | Description                                                                      |
| ---------------------------- | -------------------------------------------------------------------------------- |
| [Lobby](/lobby.md)           | Connect players before or during a game.                                         |
| [Relay](/relay.md)           | Connect players securely using the Relay service without dedicated game servers. |
| [Matchmaker](/matchmaker.md) | Match players based on a variety of parameters for better user experiences.      |