Uploaded December 2024 | Updated September 2026, 2 weeks ago

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Learn how to implement a Finite State Machine (FSM) using Unity's Behavior Graph! In this final part of the Behavior Graph tutorial series. We will first add Patrol and Idle behaviors to our enemy just to realize that our graph is becoming more complex with each new behavior. To solve this we'll reorganize our AI into a clean, maintainable state machine.

In Part 3 we will cover:
- Adding Patrol & Idle behaviors
- Understanding state machine concepts
- Converting complex logic to FSM
- Creating clear state transitions
- Making AI behaviors more maintainable

Part 1: youtu.be/VWxgTeCtDAs
Part 2: youtu.be/cJwG9al1s7Y
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Download the Starter Project at:
patreon.com/posts/117604296

Resources:
Behavior Graph doc: docs.unity3d.com/Packages/com.unity.behavior@1.0/manual/behavior-graph.html
FSM article: gameprogrammingpatterns.com/state.html
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Learn more about C# & Game Dev in Unity in my video courses at:
courses.sunnyvalleystudio.com

Join the discord:
discord.gg/RQEtYHz

You can support me through Patreon:
patreon.com/sunnyvalleystudio

Assets used:
kaylousberg.itch.io

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00:00 Overview
00:21 Adding Patrol logic
04:30 Adding new Idle behavior
09:35 Introducing Finite State Machine
11:56 Create states in Behavior graph

#unity3d #ai #gamdev