Overview

Overview

The Fusion Plugin SDK lets you write a custom Fusion shared-mode server plugin, run it locally for development, and deploy it to a Photon Enterprise Cloud.

A custom plugin runs alongside the cloud-hosted game session and can read every Networked property, intercept RPCs, hold authority over selected pieces of state, spawn server-side objects, and call into your services. It's the right tool when shared-mode authority isn't enough on its own — typically for trust-sensitive logic that you don't want any client to control.

Common uses:

• Running a subset of game logic server-side so outcomes can't be tampered with by clients.
• Detecting and flagging cheating users without alerting them.
• Validating client authoritative state against achievable bounds.
• Bridging the session to your external services.

What the SDK ships with:

• A custom-plugin project template (Fusion.Plugin.Custom) with the three core partial classes already wired up.
• A generated types bridge (Fusion.Plugin.Types) that mirrors your Unity NetworkBehaviours, networked structs, prefab data, and scenes into a server-runnable form.
• Prebuilt Fusion runtime binaries (Lib/) for both Debug and Release.
• A local Photon Server (Photon.Server/) you can use to run your plugin on your dev machine.

Setup

Install the SDK, run the local server, and connect your first session.

Features

Reference for everything a custom plugin can do — exports, RPC interception, plugin authority, and server-side hooks.

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