One in a Moonion started from a concern about what happens when AI eventually surpasses human capabilities. At some point, it becomes increasingly difficult to justify doing something yourself when a machine can do it faster, better, and with less effort. Relying on that machine is often the rational decision. But the question becomes more concerning when that logic extends beyond individual tasks and starts shaping how people live. When there's an objectively better way to do almost everything, choosing anything else begins to seem irrational. Over time, conformity becomes the expectation, and people gradually surrender the ability to determine their own direction.
The team wanted to explore a future in which that process has already happened. In 2076, humanity has become almost entirely integrated with machines, and everyone travels to the Moon on their 18th birthday. It's a routine part of growing up, with an AI managing the journey.
What it does
The world is governed by the Overseer, an AI that promises to make everyone's lives easier. Even the protagonist's parents have embraced its cybernetic upgrades. Reaching the Moon is entirely possible through the Overseer's technology, provided the player is willing to convert into a robot as well. But on the protagonist's birthday, a mysterious gift from their grandmother offers another possibility. Rather than accepting the Overseer's solution, the player begins working toward a journey of their own. Inside Grandma's old garage, they discover the materials needed to construct a rocket. Eventually, they reach Mission Control, where they must understand and debug its launch program while their increasingly unsettling parents attempt to convince them to abandon the effort.
As the Overseer's influence grows, the protagonist's determination to reach the Moon becomes a struggle over who gets to decide their future. Through interactive problem-solving, the game aims to let players experience the satisfaction of understanding something well enough to accomplish what initially seemed impossible.
How it was built
One in a Moonion was built in Unity for the Meta Quest 3. Translating the vision into something playable required the team to think carefully about how every interaction should actually work. The majority of the weekend was spent developing detailed specifications and testing the resulting systems. In Mission Control, for example, the team insisted that the rocket's programming interface use real executable logic. When a player encounters an error, the correction must genuinely change the program's behavior. Otherwise, the experience of learning to solve something for yourself would be little more than an illusion.
That attention to detail extended to the VR interactions themselves. A gift box that worked in isolation began tipping over when its lid opened inside the Bedroom, forcing the team to revisit its physics and verify the correction in Unity. These were the kinds of problems that demonstrated how much work existed between generating code and creating a believable experience.
And most importantly Claude. There's something wonderfully ironic about using AI to build a game about resisting dependence on AI. Throughout development, the team constantly confronted the temptation to accept whatever the agents produced simply because it worked. Much of the implementation was entrusted to Claude, while the team learned just how precise they had to be about retaining ownership of the result.
Challenges encountered
The greatest challenge unfortunately was that the team was forced to confront its own philosophy while making this game. The original vision was an open-world adventure where players could discover their own path to the Moon, collecting clues from NPCs to eventually build out the rocket.
But there was only one weekend to build.
As the deadline approached, the sprawling world became a much more controlled experience. Every compromise brought the team closer to a finished game, but further from the freedom originally imagined. The team was building a game about the cost of surrendering autonomy, while slowly surrendering its own creative freedom to finish it. In the end, the developers found themselves confronting the same question as their player: How much of your dream can you sacrifice before it stops being yours?
Accomplishments
The accomplishment we're most proud of is getting one of our teammate's little brother to actually play One in a Moonion. He was one of the biggest reasons we wanted to build this game. We'd spent the weekend thinking about what it means for children to grow up in a world where AI can accomplish almost anything for them. Getting to watch him experience our game, and hearing his thoughts afterward, made all those conversations feel incredibly personal.
As a team, we are proud of how much of our ridiculous ambition we managed to bring to life. From the birthday opening to Grandma's garage and Mission Control, we brought together interactive environments, an evolving narrative, and an actual block-programming system that executes the player's instructions.
What the team learned
The team came away with a much better understanding of how VR can make an idea feel personal. In Mission Control, the Overseer takes control of the protagonist's parents while the player is still trying to fix the rocket. Allowing the player to continue working through that confrontation made the scene far more unsettling. The system is demanding obedience at the moment the player is relying on their understanding to escape it.
That moment helped the team appreciate something about the relationship between gameplay and storytelling. The player experiences the tension through a decision they're personally responsible for, and the outcome depends on what they actually do. Perhaps the most interesting lesson was that a philosophical idea becomes much more powerful when the player discovers its implications before they ever have to put them into words.
What's next for One in a Moonion
The team hopes to return to the open-world game originally envisioned, where players can explore a living city and gradually develop the knowledge to build their own way to the Moon. That means expanding the construction system until players can experiment with solutions the developers haven't explicitly designed for them. Another goal is to test the experience with younger players to understand whether that freedom translates into meaningful learning.
The Overseer's convenient route is intended to remain a viable option, since surrendering control should be tempting. Path of least resistance. Players should have to wrestle with whether the effort of learning something is still worthwhile when someone else can simply do it for them.
At the end of the game, Grandma's letter asks the player to tell her what they saw on the Moon. The hope is that someday a child takes off the headset and starts telling someone about a mistake they made while building their rocket, and how they finally figured it out.
Before they even think to mention the Moon. That's what it means to be one in a moonion.
