Features
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SDK 1.7 Preview
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Fast network engine with cloud scaling, state replication, persistence and auto load balancing.
Easy to develop, iterate and operate connected games and experiences.
SDK allows developers to make multiplayer games using Windows, Linux or Mac, targeting desktop, console, mobile, VR or the web.
Game engine plugins and visual tools will help even non-coders create and quickly iterate on a connected game idea.
Scalable from small games to large virtual worlds running on hundreds of servers.
Game-service features like and .
At the core of coherence lies a fast network engine based on bitstreams and a data-oriented architecture, with numerous optimization techniques like delta compression, quantization and ("Level of Detail") to minimize bandwidth and maximize performance.
The network engine supports multiple models:
Client authority
Server authority
Server authority with client prediction
Authority handover (request, steal)
Distributed authority (multiple simulators with seamless transition)
Deterministic client prediction with rollback ("") - experimental
Different authority models can be mixed in the same game.
Custom UDP transport layer using bit streams with reliability
WebRTC support for WebGL builds
Smooth state replication
Server-side, Client-side, distributed authority
Connected entity support
Fast authority transfer
Remote messaging (RPC)
Persistence
Verified support for Windows, macOS, Linux, Android, iOS and WebGL
Support for Rooms and Worlds
Floating Origin for extremely large virtual Worlds
TCP Fallback
Support for Client hosting through Steam Datagram Relay
Unity SDK with an intuitive no-code layer
Per-field adjustable interpolation and extrapolation
Input queues
Easy deployment into the cloud
Multi-room Simulators
Multiple code generation strategies (Assets/Baking, automated with C# Source Generators)
Extendable object spawning strategies (Resources, Direct References, Addressables) or implement your own
Per-field compression and quantization
Per-field sampling frequency adjustable at runtime
Unlimited per-field levels of detail
Areas of interest
Accurate Simulation Frame tracking
Network profiler
Online Dashboard for management and usage statistics
Automatic server deployment and scaling
Multiple regions in the US, Europe and Asia
Player accounts with a persistent key/value store
Matchmaking and lobby rooms
coherence supports out of the box. This means that the state of the world is preserved no matter if clients or simulators are connected to it or not. This way, you can create shared worlds where visitors have a lasting impact.
The coherence SDK only supports Unity at the moment. Unreal Engine support is planned. For more specific details, please check the page. For custom engine integration,.