Mirror

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The #1 free open source game networking library for Unity 2019 / 2020 / 2021 / 2022 / 2023 / 6000.

Used in production by major hits like Population: ONE and many more.

Originally based on UNET: battle tested since 2014 for 9 years and counting!

Mirror is stable, modular & easy to use for all types of games, even small MMORPGs.

Architecture

The Server & Client are ONE project in order to achieve maximum productivity.

Simply use NetworkBehaviour instead of MonoBehaviour, with:

▣ [Server] / [Client] tags for server-only / client-only code

▣ [Command] for Client->Server function calls

▣ [ClientRpc] / [TargetRpc] for Server->Client function calls

▣ [SyncVar] / SyncList to automatically sync variables from Server->Client.

Making multiplayer games this way is fun & easy!

Features

Mirror comes with a wide variety of features to support all game genres.

Many of our features quickly became the norm across all Unity netcodes!

▣ Transports: UDP, TCP, WebGL, Steam, etc.

▣ Interest Management

▣ Sync Direction

▣ Latency Simulation

▣ Batching

▣ Rpcs & SyncVars

▣ Allocation Free

▣ Transform & Physics Sync

▣ Child Components

▣ IL Post Processing

▣ Two Click Hosting

▣ Snapshot Interpolation

▣ Lag Compensation

▣ Prediction

▣ Two Click Hosting

Getting Started

Get Unity 2019/2020/2021/2022/2023 LTS, download Mirror, open one of the examples & press Play!

Check out our Documentation to learn how it all works.

Funding

Mirror is free & open source software funded by Donations. If you love it or need priority support, please consider supporting Mirror on GitHub :)

Build the Metaverse, with Mirror Networking!

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This asset uses Mirror under MIT License; kcp under MIT License; Mono.Cecil under MIT License; Telepathy under MIT License. See Third-Party Notice.txt file in package for details.