About Unity Behavior

Unity Behavior is a visual tool for authoring behaviors that control non-player characters (NPCs), gameplay logic, objects, and scene interactions in Unity.

Use Unity Behavior to control the interactions of multiple characters, orchestrate cinematic scenes, trigger timed or contextual events, and react to player actions. It takes the complexity out of behavior authoring, thereby bringing vision to life with ease.

Note

Unity refers to behavior trees as behavior graphs to highlight its advanced capabilities and added features. Unlike traditional behavior trees, behavior graphs in Unity Behavior allow for non-linear structures where branches can merge back, enabling more complex and interconnected behaviors.

Note

It's free to use Unity Behavior.

Explore the Unity Behavior features and get started with using behavior graphs.

Topic	Description
Behavior graphs	Get started with understanding a behavior graph and its components.
Behavior graphs node types	Understand the logic flow in a behavior graph using nodes.
Unity Behavior user interface	Understand the main window of the Unity Behavior editor.
Install Unity Behavior with the Package Manager	Use the Package Manager to install Unity Behavior.
Create a behavior graph	Learn how to create and open a new behavior graph in Unity, add nodes, and connect them to define agent behavior.
Save and load running graph state	Save and restore the state of behavior graphs.
Debug the Agent in real time during Play mode	Understand the workflow and how the behavior graph runs.
Troubleshooting issues with Unity Behavior	Use these solutions to common problems while working with behavior graphs, including debugging tips and known limitations.