Connection Permissions: CanSpawnObjects and CanRefreshObjects
The host can change permissions for a specific in s&box multiplayer. The ideal place to set these permissions is in the network event callback when a player con…
Network Events: INetworkListener for Player Join, Leave, and Active Callbacks
Implement or on a component to react to players joining and leaving the game. INetworkListener Example Spawn a player object when someone joins: INetworkListene…
NetworkSpawn, Ownership Transfer, and Network.Refresh in s&box
NetworkSpawn and Ownership Transfer in s&box Spawning a Networked Object Ownership Transfer Modes (OwnerTransfer) Taking and Dropping Ownership Checking Ownersh…
WebSockets - s&box Networking Documentation
WebSockets s&box supports WebSocket connections for real-time communication with external servers. Use for custom networking, persistent data, or integrating wi…
NetworkHelper — quick multiplayer setup with auto-server and player spawning
NetworkHelper — Quick Multiplayer Setup is a built-in s&box component that handles the boilerplate of starting a server and spawning players. It's the fastest w…
Testing Multiplayer - s&box Networking Documentation
Testing Multiplayer s&box provides tools for testing multiplayer locally without needing multiple computers or Steam accounts. New Instance Launch a second game…
Component Marker Interfaces: ExecuteInEditor, DontExecuteOnServer, IDamageable, INetworkSpawn, IPressable, INetworkVisible
Component Marker Interfaces: ExecuteInEditor, DontExecuteOnServer, IDamageable, INetworkSpawn, IPressable s&box uses marker interfaces nested inside the class t…
IGameObjectNetworkEvents: Ownership Change and Control Transfer Events
lets Components on a networked GameObject react to ownership changes. The events are targeted only at the specific GameObject whose ownership is changing. Inter…
IGameObjectNetworkEvents: StartControl, StopControl, and NetworkOwnerChanged Callbacks
IGameObjectNetworkEvents: Ownership Change Callbacks Implement on a component to receive callbacks when network ownership of the parent changes. Interface Metho…
Networking State in s&box: IsHost, IsClient, IsActive, and Lobby Management
Networking State in s&box: IsHost, IsClient, IsActive Understanding the networking state is critical for writing correct multiplayer code in s&box. Key Properti…
ConVar and ConCmd: Console Variables and Commands in s&box
ConVar and ConCmd: Console Variables and Commands s&box uses and attributes on static properties and methods to expose them to the console system. ConVar (Conso…
Network visibility — culling networked objects per client with INetworkVisible
Network Visibility — Culling Networked Objects Per Client Network visibility controls whether a networked object sends updates (Sync Vars, transforms) to a spec…
System Requirements - s&box Documentation
System Requirements Recommended OS: Windows 10 or Windows 11 Processor: Quad-core processor Memory: 16 GB RAM Graphics: NVIDIA GTX 1060 or AMD RX 580 Storage: 5…
Network Helper
Network Helper Pre-built component for common multiplayer scenarios. What It Does NetworkHelper handles typical multiplayer setup: Auto-creates server if enable…
Network Ownership System
Network Ownership System Control who simulates and updates networked GameObjects with the ownership system. Ownership Basics Every networked object has an Owner…
RPC Security: How s&box Validates Incoming RPCs — Attribute Check, Permission Flags, Kick on Unauthorized
RPC Security: How s&box Validates Incoming RPCs Understanding how s&box validates incoming RPCs is important for writing secure multiplayer code. Validation Ste…
Network Visibility Culling: AlwaysTransmit, INetworkVisible, CullDelay, and PVS-Based Object Culling
Network Visibility Culling: How s&box Decides What to Send to Each Client s&box has a built-in network visibility culling system that avoids sending updates for…
Console Variables and Commands: ConVar and ConCmd with Flags
Console variables () and commands () let you create tweakable settings and runnable commands accessible from the s&box console. Console Commands Static methods …
Network Ownership: Taking, Dropping, and Transferring Object Control
Networked GameObjects can be owned by a connection. Objects owned by a connection are simulated by that connection — their position and sync variables are contr…
Console Variables and Commands: ConVar and ConCmd Runtime Configuration
s&box provides console variables () and console commands () for runtime configuration and debugging. Console Commands Static methods with attribute: Server Comm…