Player & NPC Behaviour AI Framework: NavMesh, Blend Tree, State Machine

Save time on your Player movement and NPC state-machine behaviour setup! This is a NavMesh-driven NPC behaviour system and a player controller framework ready to drop into your 3D action game and drive your own animations.

Wander, Chase, and Attack are built as Animator states. You can see them, rewire them, and add your own directly in the Animator window.

NPC AI

• NavMesh agent driven by an Animator state machine: Wander, Chase, Attack
• Detects targets by tag
• Hostile / Peaceful toggle: hostile NPCs seek and attack, peaceful ones only wander

Player

• Rigidbody movement already wired to an Idle/Jog/Run blend tree, a grounded jump, and a melee attack
• Works with the legacy Input Manager, the new Input System, or both

Bring your own Models and Animations

The character model and animations in the screenshots and video are not included. They are shown to demonstrate retargeting onto your own rig.

Both Animator Controllers ship fully built: states, parameters, transitions, blend trees. Only the Motion fields are empty. Import your model and clips, drop them into the slots, and everything runs. No code changes. The Player and NPC prefabs come with a placeholder capsule body. You can replace them when you add your own model.

Demo scene

A terrain with a baked NavMesh, a Player and a hostile NPC, floating health bars,

and on-screen controls. Open it and press play.

Combat, kept optional

Health, damage, and death are handled by small, optional sample scripts, separate from the core AI and Player controllers. Both the NPC and Player attack scripts deal damage inside a configurable forward cone, 120 degrees by default, so a target that slips behind mid-swing doesn't take a hit for free. Use them as a starting point, tune the numbers, or delete them if you're building your own combat system.

Good fit for

• Roguelites and top-down action
• Isometric action
• Any 3D game that needs simple, readable melee enemy AI as a starting point

Movement is world-space, not camera-relative, and the character always faces the direction it's moving. Great for top-down and isometric. It will work with a third-person camera, but it won't feel like typical third-person controls, with no independent strafe and no camera-relative aiming, so feel free to bring your own controllers while still using NPC logic from the asset as usual

Requirements

• Unity 6000.3 or newer (tested on 6000.3.8f1 and 6000.5.3f1)
• A baked NavMesh in your scene

Support

[email protected]