How to make AI in Unity

In this Unity tutorial, we’ll create Bob, a hostile AI with patrol, pursue, and attack behaviours powered by a state machine and nav mesh navigation. This step-by-step guide covers everything you need to build a functional AI enemy, from detection ranges to projectile firing systems and customizable attack logic.

We’ll walk through:

Creating Bob's AI brain using Unity’s NavMeshAgent and AI navigation tools.
Detecting players with sphere casts and handling attack cooldowns.
Setting up patrol routes with waypoints and search patterns for realistic behavior.
Implementing coroutines for fire rate control and state transitions.
Creating materials to bring the scene to life.

This tutorial is beginner-friendly and ideal for Unity developers looking to learn AI scripting and enemy behaviors. Whether you're building hostile AI enemies for shooters, RPGs, or strategy games, Bob’s state-driven design is fully customizable to suit any project.

💾 Scripts and Assets Download: https://www.dropbox.com/scl/fi/a3rtdv...
🎯 Unity Version Used: 2022.3.12f1
📱 Follow me on X: https://x.com/brockoshvideos
🔔 Subscribe for more Unity tutorials and let me know in the comments what AI tutorials you'd like to see next!

CHAPTERS:
00:00 Introducing Bob
00:10 Script Explained
01:02 Engine Set Up Explained