Get a mission in Codex
Codex is an AI agent that works with files on your computer. In the game, it guides the story and helps you complete challenges.
RELAY / Full Edition
Learn AI. Step into the mysterious world of Relay.
Buy the Full EditionA story game inside Codex where you learn to work with AI and build your own 3D world or quest bot. Start from scratch. Play solo or with friends.
$49 for a team of up to five
Save 33% compared with buying each part separately.
See how the game works
The First Signal / The whole story
01 / What kind of game is this?
The story moves on.
The skills stay with you.
The connections between RELAY’s stations have gone down. Your task is to bring the network back to life. Each step of the story is a practical challenge you solve with AI on your computer.
Turn your idea into a result
Give the agent tasks, create files, and build your character, tools, and system rules.
Check that it works
Open what you’ve made, try it, find mistakes, and fix them. Your station grows as your skills do.
Mission → action → checkExample
Here’s what practice looks like
“Build a quest bot. It asks a riddle, checks the answer, and opens the next step only when the answer is right.”
RELAY / Quest botWaiting for an answer
I repeat your voice, but I can’t speak. What am I?
Try “wind”, then “echo”. Compare the bot’s responses.
An interactive example of a challenge. In the game, you’ll create your own scenario and test how the bot responds to different answers.
02 / A role for everyone
See the story
from another side.
Invite friends or family. One person builds a world, another runs a quest, another finds a weakness. All five roles are included—choose what interests you.
The Quiet Workshop / Main role
Give your idea a shape.
Create a pet in Blender, set the rules of its world, and build a local 3D scene. Learn to guide AI from an idea to a working system.
What you’ll keep
A 3D pet, an interactive world, agent tools, and setup instructions.
20 missions, including the introduction
Resonance Station / Main role
Make the story answer back.
Imagine your companion’s personality, riddles, and dialogue rules. Build a quest bot, connect an external channel, and guide a player through your scenario.
What you’ll keep
A working quest bot, an operator panel, agent tools, and setup instructions.
20 missions, including the introduction
The Proving Hall / Extra role
Find what others missed.
Spot subtle mistakes, check data, and put systems through difficult cases. Turn each finding into a check someone else can repeat.
What you’ll keep
A set of checks and reports that show what needs fixing and how.
16 missions, including the introduction · A separate story and ending
The Interchange / Extra role
See how it all connects.
Map a project from its data, find contradictions, and check sources. Make an unfamiliar system understandable to someone new.
What you’ll keep
A map of project connections, checked data, and a clear handover.
16 missions, including the introduction · A separate story and ending
The Control Room / Extra role
Show how it works.
Record a playthrough, read instructions through a newcomer’s eyes, and build a clear demo. Learn to present your work while keeping personal data and secrets out of view.
What you’ll keep
A project demo and instructions someone else can use to run it.
16 missions, including the introduction · A separate story and ending
Together, with a task of your own
The Keeper and Signal Operator connect two systems. The extra roles test results, explore connections, and help hand the work over.
A full game for solo players, too
You can play the whole story without a team. The game’s Node helps at cooperative stages, and the extra roles have ready-made practice systems.
03 / From your first steps to your own project
Three chapters.
From idea to launch.
You start with a simple request to AI.
By the end, you can build a system, test it, and hand it over.
Missions unlock in order as the story unfolds.
Learn to stay in control of AI.
Set clear tasks. Check files and mistakes. Manage memory, permissions, and the changes your agent makes.
What you’ll learn
Requests and plans you can verify, files and paths, memory and context, terminals and environments, permissions and secrets, protection from instructions hidden in data, and rolling back changes.
Your result
Your first working control panel and a solid foundation for your own project.
Introduction + 7 missionsChapter II / Specialization
Build your own system.
The Keeper creates a 3D pet and the beginnings of a world. The Signal Operator creates a character and a bot. Both learn to turn one-off requests into reusable tools.
What you’ll learn
Skills, character descriptions you can check, data formats, bot rules and states, external services, and cost control. MCP gives an agent a limited set of tools.
Your result
The foundations of a 3D world or quest bot, with your own rules and tools.
6 missions for your main roleChapter III / Working together
Get it ready for a real launch.
Build a team of AI agents and finish your world or quest. Connect systems, test them, and hand over a result someone can run without you.
What you’ll learn
Splitting tasks between agents, comparing solutions, launching a web project, checking logs, exchanging data, testing other people’s tools, and writing documentation for a new participant.
Your result
A finished project, experience working together, and your Ability Atlas.
6 missions for your main role04 / After the ending
Your next project.
Your own rules.
Learn skills you can use beyond the game: bring ideas to life with AI and combine a team’s efforts around a shared result.
- 01Turn an idea into clear tasks and working files.
- 02Know when to trust AI, when to check, and where to set limits.
- 03Find the cause of a problem and get a solution running.
- 04Share your work so the team can take it further.
Bonuses along the way
Curiosity
gets rewarded.
Try extra challenges and explore difficult cases. Earn your station’s currency, exchange it for Relay Coins, and spend them in the pet and Artifact Store.
Bonus challenges are included. Play them if you’d like to.
05 / How to start
No experience needed.
Bring your idea.
Start from scratch. Learn each tool as it becomes useful for your missions.
What you’ll need
A computer, internet access, and Codex with a subscription. You’ll install other tools as you play.
Open Codex
Prepare the game folder on your computer and follow the setup instructions.
Choose a role. Invite your people.
Start as the Keeper or Signal Operator. Share the included roles with friends or family.
Send your first signal
Talk to your guide, take on challenges, and check the result. Your story has begun.
Before the first signal
Still have
questions?
I’ve never used AI. Can I play?
You don’t need prior experience. The game begins with a simple task in Codex: explain an idea in your own words and check the file it creates. The challenges grow as you play.
Do I need a team of five?
No. Play the entire Full Edition solo or with friends. Five roles give you room to grow your team. The extra roles are optional, each with its own story and ending.
Does everyone have to play at the same time?
No. Each person works in their own project folder. The main stations exchange results through the game’s Node. There’s a solo path if you don’t have a partner. Extra roles can use ready-made practice systems.
What exactly is included?
Three chapters, the two main roles—Keeper and Signal Operator—and three extra roles—Tester, Mapper, and Chronicler—plus bonus challenges and the Ability Atlas. One edition covers a team of up to five. Missions unlock as the story unfolds.
Do I need to play RELAY Day first?
No. The free game introduces the story, but you can start the Full Edition and find your way into the world without it.
Will every player make the same project?
No. Missions set the challenges and the checks, while you choose your ideas, your companion’s personality, and your solutions. The Keeper and Signal Operator build different projects; extra roles explore and test the results from their own perspectives.
What is Codex, and how do I install it?
Codex is OpenAI’s AI assistant for working with code and project files. Describe your task in everyday language and it helps you do the work. To start, install the ChatGPT desktop app for your system, sign in with your ChatGPT account, and select Codex from the app menu. Then open the game folder. Official setup instructions ↗
The whole story / One purchase
Bring your people.
Build something of your own.
Three chapters, five roles, and a shared reason to get to know AI. Then take on the project you’ve wanted to build.
33%saved on the complete edition
compared with buying every part separately
compared with buying every part separately
You can start solo. Your team can join later.
RELAY / Full Edition
All parts bought separately$72
$49
for a team of up to five
- All 3 chapters of the main story
- Keeper + Signal Operator
- Tester + Mapper + Chronicler
- Bonus challenges
- Ability Atlas
OpenAI API usage is paid for separately. Earlier purchases aren’t credited towards the edition.