Unreal Engine plugin

AI NPCs for Unreal Engine 5

Design characters visually, add the plugin to your project and wire them into gameplay from Blueprints. Voice in and out on desktop and mobile.

Get started for free

Free plan
No credit card
Unity, Unreal, Godot and Web API

Cora, the Neocortex AI character, waving hello

4
ways to integrate
Unity, Unreal, Godot, Web API
20+
languages
set per character
10 s
to clone a voice
or design one from text
€0
to start
free plan and editor testing

Powered by Industry Leaders

Get started

From zero to a talking character in Unreal Engine

1
Design your character
Build personality, knowledge, emotion and actions in the visual editor, and test it in the browser for free.
2
Add the plugin
Clone the plugin into your project's Plugins folder:
git clone https://github.com/neocortex-link/neocortex-unreal-sdk Neocortex
3
Connect and play
Enable the plugin, add your API key and use the components from Blueprints or C++.

Requirements

Unreal Engine 5.0 or later
A C++ project (components are usable from Blueprints)
A free Neocortex account and API key

Read the Unreal Engine docs

What you get

Built for Unreal Engine developers

Blueprint components

Wire characters into gameplay without writing C++ for every interaction.

Voice in and out

Push-to-talk recording, transcription and streamed replies.

Mobile ready

Android and iOS microphone setup documented, alongside Windows and macOS.

Right-to-left text

Chat panels shape and order Arabic and Hebrew correctly.

Actions

Characters return actions your Blueprints can execute.

Same character everywhere

The character you build also works in Unity, Godot and the Web API.

How it works

Characters you design, not prompts you babysit

Personality, emotion, knowledge and world are nodes you connect, not prompts you rewrite.
Intents and actions turn what a player says into something your game does.
Test every character in the browser for free before it reaches your engine.

The Neocortex visual character editor with emotion, personality, language, voice, knowledge, intent and action nodes — A bartender character in the Neocortex editor.

What Our Customers Say

Discover what creators are saying about building with Neocortex.

After trying several Smart NPC providers, I came across Neocortex while looking for a stateful conversational AI solution for our Virtual Education platform. Neocortex stood out and topped all our key considerations.

Vallikat Peethamber

Managing Director

Neocortex opened scalable solutions for our VR platform, letting us create scenarios that make training more immersive. Keeping AI agents within clear boundaries is hard, but Neocortex handles it very well and makes customization easy.

Ottó Farkas

IT Specialist / Project Manager

In classroom practice, Neocortex and its action-based mechanism provide students with an out-of-the-box way to bridge conversational agents into software and hardware-based interaction design workflows.

Hongming Li

Lecturer / Instructor

I found out about Neocortex while I was working on my final-year project, and the platform's ease of integration and accessibility enabled me to seamlessly implement smart NPCs in my application. Highly recommend it!

Angela Pellillo

Backend Developer

Neocortex was the first step in bringing LLM-powered NPCs into a real Unity3D prototype, fast-tracking development and growing my TikTok account from 0 to 4000 followers within a month!

Brandan Chen

Associate Game Producer

Vallikat Peethamber

Managing Director

Ottó Farkas

IT Specialist / Project Manager

Hongming Li

Lecturer / Instructor

Angela Pellillo

Backend Developer

Neocortex was the first step in bringing LLM-powered NPCs into a real Unity3D prototype, fast-tracking development and growing my TikTok account from 0 to 4000 followers within a month!

Brandan Chen

Associate Game Producer

Proven at the Supercell Global AI Game Hackathon

Neocortex powered all three top games in a category, plus the winner of a second category.

Read the story

FAQ

Neocortex for Unreal Engine: common questions

Which Unreal versions are supported?

The Neocortex Unreal plugin supports Unreal Engine 5.0 and later.

Does it work in Blueprint-only projects?

The plugin needs a C++ project to compile. Once installed, its components can be used from Blueprints.

Which platforms does the Unreal plugin support?

Windows, macOS, Android and iOS, with microphone permission setup documented for mobile.

How is it different from NVIDIA ACE?

ACE gives you on-device models to assemble in C++ for RTX PCs. Neocortex gives you complete characters designed visually, with voice, delivered through a plugin.

Comparing tools?

How Neocortex compares for Unreal Engine teams

NVIDIA ACE alternative

NVIDIA ACE is a powerful on-device toolkit for Unreal Engine 5 and RTX GPUs. If you build in Unity, ship to mobile or the web, or lack a C++ team, Neocortex gets you a talking character today.

Convai alternative

Convai counts every character reply against a monthly quota, with concurrency set per API key. Neocortex gives game teams monthly credits, free editor testing and characters designers control.

Inworld AI alternative

Inworld moved its focus to voice and inference for consumer apps and retired Character Studio. Neocortex keeps character design visual, game-first and in your engine.

Build a character for your UE5 project

Free plan, no credit card. Build a character in the browser and talk to it in minutes.