Game Creator 2 Networking Layer

Transport-agnostic, server-authoritative multiplayer layer for Game Creator 2.

Online documentation: https://arawn-software-publishing.gitbook.io/networking-layer-for-gc2

Download: https://github.com/crizzler/NetworkingLayerForGC2/releases/

Release Status: Alpha
This package is currently in Alpha. APIs, behavior, and documentation may change between releases.

What This Package Is

• A runtime networking layer for GC2 that is not bound to one networking SDK.
• A strict authority/security model designed for coop and competitive multiplayer.
• A module system that lets you wire one transport stack and keep GC2 gameplay integration consistent.

The core layer remains transport-agnostic. PurrNet is included as the currently supported concrete transport, and future transport folders can plug into the same manager/controller send/receive APIs.

Supported Modules

• Core
• Inventory
• Stats
• Shooter
• Melee
• Quests
• Dialogue
• Traversal
• Abilities (DaimahouGames third-party module integration)

Core Runtime Entry Points

• NetworkTransportBridge / INetworkTransportBridge
• NetworkCharacter
• Module managers/controllers (Core, Inventory, Stats, Shooter, Melee, Quests, Dialogue, Traversal, Abilities)
• NetworkSecurityManager + SecurityIntegration

Integration Model

1. Implement your bridge by inheriting NetworkTransportBridge.
2. Wire outbound delegates from managers/controllers to your transport sender.
3. Route inbound transport packets to the matching manager/controller Receive* APIs.
4. Register ownership mappings early (characterNetworkId -> ownerClientId) so strict validation succeeds from first request.
5. Normalize sender IDs through NetworkTransportBridge.TryConvertSenderClientId(...) (clientId = 0 is valid).

Setup Wizard

Use Game Creator > Networking Layer > PurrNet Scene Setup Wizard for PurrNet projects. The generic scene setup wizard is hidden automatically when a transport-specific wizard is installed. Follow this guide when no PurrNet Transport is present: https://arawn-software-publishing.gitbook.io/networking-layer-for-gc2/getting-started/quickstart

When a Player Prefab is assigned and preparation is enabled, the wizard can add NetworkIdentity, NetworkCharacter, PurrNetNetworkCharacterAuto, selected module controllers, optional NetworkVariableController for local GC2 variables, and pre-registered animation clips used by Network State, Dash, or Gesture instructions.

Patch System

Use Game Creator > Networking Layer > Patches outside Play Mode. The PurrNet Scene Setup Wizard validates the required patch for every selected module.

• Inventory, Melee, Shooter, and Traversal networking require their current server-authority patches.
• Shooter also requires the remote-camera-safety Sight patch.
• Updating or reinstalling a patched GC2 module can overwrite its hooks; rerun the wizard and reapply any patch reported as missing or stale.
• The Networking Layer fails closed when required hooks are unavailable.

See:

• Online documentation

Quickstart

Start here for transport wiring:

• Quickstart
• Public API
• PurrNet Transport

Contributing

Recommended default flow: fork -> branch -> pull request.

1. Fork the repository.
2. Create a branch from main (example: fix/melee-hit-validation).
3. Keep changes scoped and atomic (one concern per PR when possible).
4. Verify Unity compiles cleanly for affected modules (no new errors).
5. Open a PR with:
   • What changed
   • Why it changed
   • How to test it

Notes:

• If you have direct write access, branch + PR in the main repo is still preferred over direct pushes to main.
• For release packaging/sync, include Assets/Arawn/NetworkingLayerForGC2/ and its generated documentation/assets as required by the package release.

License

This networking layer is MIT licensed.

See:

• License