Introduction to Multiplayer

You can use Castle to create multiplayer games with real-time shared state.

This section of the docs assumes you are familiar with the fundamentals of creating with Castle, such as Blueprints, Actors, Behaviors, Rules, and Tags.

Creating muliplayer games is more complicated than creating single-player games in a few ways:

• State needs to be synchronized across many devices.
• When modifying an actor, you need to be aware of which device controls the current actor.
• When running logic in general, you need to be aware of which device is the one running the logic.
• Groups of people will be grouped into Sessions, and different types of Session behave differently.

Castle provides a system for deciding who controls what. The system is described in Shared blueprints and Sessions.

Example multiplayer patterns

Many common patterns in Castle change when transitioning from single-player to multiplayer. To cover some common cases, check out our list of focused Multiplayer examples.