Setting the Benchmark for Multiplayer Games.
Photon Fusion is the high-end state transfer netcode SDK made for Unity Professionals. Give players the best experience for any gameplay with multiple Network Topology choices.
Powerful Features Required to Build the Best Multiplayer Games:
Tick-Based
Simulation
Core feature of stable and accurate networking. Foundation for client side prediction and snapshot interpolation.
Client-Side
Prediction
Give players an instant response to their own inputs without giving up server authority, even under high latency and network loss.
High
Performance
Handle thousands of networked object over hundreds of client connections, including complex interest management.
Snapshot
Interpolation
Provide smooth visual rendering of remote objects for a client, even during bad networking conditions.
Lag
Compensation
Compensate for the delay between the client firing his weapon and the server registering the potential hit.
Replication
Systems
Per object full consistency or eventual consistency.
Unity Verified Solution
The Unity Verified Solutions program, including Photon Fusion, denotes top-quality, compatible solutions rigorously reviewed for seamless Unity integration, highlighting a key achievement for developers.
MINIMIZED BANDWIDTH
Extreme Optimization:
Replication Algorithms
Fusion implements two replication algorithms that can be switched between:
Full
Consistency
(Default)
Uses additional bandwidth per object to ensure each object is internally consistent, meaning that all state you see on an object is from the same tick.
Eventual
Consistency
(Advanced)
Uses less bandwidth per object, allowing more objects to be packed into each update, but the state seen on each object might be from two different ticks.
Players
MAXIMIZED PERFORMANCE
An Evolutionary Leap in Multiplayer Engineering
Fusion is an evolution in multiplayer engineering by handling many more players and objects than ever before.
Fusion’s bandwidth usage is 6x smaller than MLAPI or Mirror; it is optimized to consume less CPU on the server, allowing more flexibility for gameplay elements or lower server specs and deployment costs.
SIMPLIFYING GAME DEVELOPMENT
Flexible Network Topologies
Fusion supports different network topologies and replication algorithms while exposing a single consistent API. This allows developers to focus on what really matters most: writing their own game.
Server
Dedicated server with public IP (headless Unity instance)
Host
One Player is the „host“. All other Players connect to him.
Hacking/cheating possible
Quality depends on host
Shared
Room has state authority and optional plugin (custom code).
Deterministic
Quantum: Each client runs a deterministic simulation.
Snapshot of Fusion Capabilities
Discover the essential details of the top-tier state-sync netcode SDK designed for Unity professionals.
Servers
Photon Cloud – The Global Low Latency Infrastructure
Reach more gamers around the world with Photon Cloud performant servers placed at 15 strategic locations while being DDoS protected. Raw power to deliver your game data as fast as possible.
Photon Fusion features saved us time and effort and met our product goals for a large player capacity. Partnering with Photon has been a pleasure.
We’ve used all of Photon’s services internally and for our external clients, so don't expect us to choose another multiplayer engine soon!
Trusted by Leading Corporations, Agencies & Platforms
Ready to Build a New
Benchmark Experience?
Fusion’s top-tier state-sync netcode SDK provides all essential features to create extraordinary multiplayer experiences.
