Realistic minds
for immersive worlds

Tryll is a middleware for game engines (Unity, Unreal Engine 5 and proprietary engines), that lets you integrate in-game AI in one prompt. Built by game developers, Epic MegaGrants Recipient.

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Agentic on-device
harness for games

Give characters a realistic mind — stop trying to script every interaction

BeforeWith Tryll

Smart NPCs

In-game characters that understand natural language, remember what the player did and act accordingly.

See it in a scene

Real Talk

Say what you actually want to say. Tryll handles speech-to-text and text-to-speech on the player’s device, with no servers in between. You get voiced NPCs in various languages including Korean, Japanese, without recording every line.

Hear it in a scene

Dynamic worlds

You build the world and set the rules. Tryll creates agents and makes sure they follow them. Players get unscripted interactions and a reliable, immersive experience.

How agents follow your rules

New genres

Tryll unlocks game mechanics that were not possible before. You could be the first to turn that into a new genre — and become the next Notch.

Browse examples
Demo

Try our demo game

Talk your way through a short scene and watch the characters react in real time

Play the demo

The AI runs on
the player’s device

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0token fees
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For
Developers

In-game AI that works out of the box — from Basic NPC and Advanced NPC to Developer Tools and Performance & Memory usage

See all features

Never build alone

Ask questions, share what you’re building and get help from the engineers who built Tryll

Join Discord

What clients are saying

Studios iLLOGIKA logo

Studios iLLOGIKA

Hervé Lange · Sr. Technical Director

“Language models represent the next major leap for interactive experiences. With Tryll Engine, I finally found technology that actually works for game developers, backed by an outstanding team whose support has been invaluable in navigating this new world.”

A scene from a GunGrounds murder mystery: questioning LUCE, the intelligence that operates Barbeta Lighthouse

GunGrounds

Kristian Macanga

“Tryll Engine allows us to bring a new level of interactivity to storytelling without sacrificing creative control. Our writers carefully craft the narrative, characters, and dialogue content, while Tryll understands players’ questions and intentions, allowing characters to respond naturally while staying true to the story, their personalities, and the knowledge defined by our writers. It’s technology that empowers our writers rather than replaces them, giving us the freedom to create experiences that traditional dialogue systems simply couldn’t deliver.”

Voice Heist mockup: the player’s robot points at an opened door and says “It’s open now, Boss. I used my head!”

Meant Well Games

Sergey Plyaka

“While developing Voice Heist, a game where players control a robot using natural voice commands, one of my biggest challenges was making speech recognition and intent understanding work together to create a seamless gameplay experience. Tryll helped me experiment with different AI models, quickly identify issues, compare what worked best, and iterate faster, allowing me to focus on making the robot feel responsive and alive.”

How to get started

1Install

Install

Add the plugin to your project. The Tryll tab appears in your editor.

2Choose a model

Choose a model

Download an open model into the project. Tryll runs it on the player’s GPU — nothing else to host.

3Build an agent

Build an agent

Connect your lore, define the role and allowed actions, then test the first conversation in the Dialog Tester.

How to build

Everything you need after the first launch

Pricing

Until your game earns $200k

Free

No seats. No per-token fees. A 1% royalty once a shipped game passes $200k USD in gross revenue.

Coming soon · Get notified
Then1%

For game developers, individuals and small businesses under $200k USD, and educators and schools with no revenue limits

Contact sales

Extra services

Custom pricing
Forward-deployed engineeringOur engineers join your team to ship the first characters
QA and evalsWe test your characters before players do
Security guardrailsKeep characters on-script, on-brand and safe
Custom AI componentsModels and tools built for your game

Got something
in mind?

Tell us about your game. We’ll ask the right questions, find the fit and plan the next step together.