What If Xbox Let Players Build With Its Worlds?

Mario is running through Elden Ring.

Not simply a character model that looks like Mario. He moves like Mario.

He triple-jumps, kicks off walls, performs acrobatics, and interacts with enemies using mechanics recognizable from Super Mario 64. In one demonstration, he swings a boss around in a way that would look more familiar in a Nintendo game than in FromSoftware's Lands Between.

Two games developed decades apart, for different hardware and different audiences, are interacting in ways neither original developer designed.

Elsewhere, modders have rebuilt older games to run on hardware they were never intended to support. Games originally associated with dedicated consoles are being adapted for personal computers and even web browsers.

Some projects use AI-assisted development. Others build on years of reverse engineering, decompilation, and community-created tools.

The important development isn't that gamers have suddenly discovered modding.

They've been modifying games for decades.

What's changing is the scope of what they're becoming capable of modifying.

Characters can move between worlds. Gameplay systems can be adapted across engines. Old software can find new life on modern hardware. Experiences that once existed only as products released by individual developers can become material for further experimentation.

These demonstrations are imperfect. They often require considerable technical expertise, have compatibility limitations, and depend on legal permissions that aren't automatically granted simply because the modifications are technically possible.

But they demonstrate something significant.

And that creates an interesting question for companies that own substantial libraries of games and intellectual property.

What happens if they decide to participate?

On October 13, 2026, Xbox announced Xbox Labs.

In her message to the Xbox organization, CEO Asha Sharma described recent experiments involving the rebuilding of games for different hardware, browser-based execution, and the combination of game content and systems in unexpected ways.

She also identified several longstanding assumptions these experiments challenge: the relationship between software and hardware, the distinction between creation and play, and the ways people discover and experience games.

Xbox Labs was introduced as a small team intended to explore emerging technologies, build experiments, and learn from how players and developers respond.

That's an intriguing announcement.

We don't know what Xbox Labs will produce, and Xbox hasn't announced the creation platform proposed here.

But the technological developments behind the announcement suggest an opportunity worth considering.

What if Xbox chose to make authorized player creation a defining feature of its next platform?

Not just the ability to build levels inside one game.

Not simply another storefront for independently developed titles.

What if Xbox allowed players to create, modify, and share new experiences using approved characters, environments, mechanics, and other resources from its existing franchises?

That would be a fundamentally different relationship between the platform, its games, and the people who play them.

Roblox provides an important example of what can happen when a gaming platform makes creation central to its experience.

Roblox isn't simply one game that receives new content from its original developers.

It provides an environment in which creators build experiences for other players.

Some create social spaces. Others build competitive games, simulations, role-playing environments, obstacle courses, or entirely different forms of entertainment.

Those experiences give players reasons to discover something new without leaving the platform.

And the scale has become extraordinary.

According to Roblox's fourth-quarter 2025 financial results, the platform averaged 144 million daily active users and generated approximately 35 billion hours of engagement during that quarter.

Its creators earned more than $1.5 billion during 2025.

Matthew Ball's State of Video Gaming in 2026 also illustrates how Roblox has grown into one of gaming's largest destinations for player attention. His analysis estimates that Roblox's engagement exceeds that of several major gaming ecosystems, although those cross-company comparisons involve different reporting methods and should be treated as estimates.

What matters most is the underlying business model.

Roblox doesn't need to develop every successful experience itself.

It provides the tools, distribution, infrastructure, and audience through which other creators can develop them.

The platform benefits when creators build experiences people want to play.

Creators benefit when the platform helps those experiences reach an audience.

And players benefit from an expanding collection of things to discover and participate in.

That relationship creates an entertainment ecosystem whose content supply is not limited to the production capacity of the platform owner's internal studios.

It's also important to recognize what makes Roblox distinctive.

Its creation tools, technical environment, economic arrangements, community systems, and audience have developed together over many years.

A successful alternative cannot emerge simply by copying its interface or introducing a marketplace currency.

But the broader principle is transferable.

A gaming platform can become more valuable when its players help create the experiences that attract and retain other players.

What would that principle look like if applied to Xbox?

Xbox possesses a substantial collection of established franchises, characters, worlds, and gameplay systems.

Halo.

Gears of War.

Forza.

Fable.

Grounded.

Killer Instinct.

Minecraft.

DOOM.

The Elder Scrolls.

And many others across Xbox's studios and publishing portfolio.

These aren't simply names on a list of intellectual-property holdings.

They represent decades of creative investment.

Studios have developed distinctive combat systems, movement mechanics, environments, vehicles, characters, animation systems, and fictional worlds.

Players have developed attachments to those experiences through years of play.

Traditionally, the relationship is straightforward.

A studio develops a game. The publisher releases it. Players purchase or access it, and some continue engaging through updates, expansions, multiplayer, or community-created modifications.

But imagine a different arrangement.

What if participating Xbox franchises could also become creative resources available through an approved platform-wide creation system?

Imagine players bringing Master Chief, Marcus Fenix, or Senua into a supported version of Killer Instinct.

Not necessarily as professionally balanced additions to the game's official competitive roster, but as characters in community-created fighting experiences.

Imagine Forza players creating events in which characters from different Xbox franchises become drivers.

Imagine Steve from Minecraft entering Grounded's backyard.

Or the children from Grounded becoming characters in a Minecraft adventure.

Now consider something more ambitious.

Imagine a creator building an entire DOOM vs. Halo experience.

Players could fight through DOOM's levels as Master Chief, using his familiar weapons, shields, and movement abilities. Then they could enter Halo's worlds as the Doom Slayer, bringing his weapons and combat mechanics into an entirely different environment.

Another creator might introduce the Doom Slayer and his arsenal into a custom Halo multiplayer experience.

These wouldn't simply be cosmetic crossovers. They could change how players interact with familiar worlds, creating experiences that neither franchise's original developers had designed.

The official games could remain exactly what their developers intend them to be.

The player-created experiences would exist within clearly defined creative environments, using only the assets and systems Xbox and participating rights holders approve for that purpose.

A professionally developed Halo game and a player-created Halo crossover should not be confused with one another.

But they could coexist.

And the second could introduce players to the first.

Xbox has spent decades creating worlds for players to explore. What if those worlds could also become material for players to create with?

A character appearing in another game isn't a new idea.

Games have featured crossover characters, costumes, and promotional collaborations for years.

Modders have also replaced character models for decades.

But the emerging experiments suggest possibilities beyond appearances.

Consider the Mario project running inside Elden Ring.

Its creators aren't merely substituting Mario's visual model for another character.

They're reproducing elements of Mario's original movement and behavior within a different game environment.

Mario's wall jumps, ground pounds, and other actions affect how players can navigate and interact with the world.

That changes the experience itself.

A similar distinction would matter for Xbox.

Placing a Gears of War character model in another game might be entertaining.

But what if an approved creation environment also allowed developers and players to work with recognizable mechanics from participating franchises?

The weight of Gears combat.

The movement capabilities of a Halo Spartan.

The construction possibilities of Minecraft.

The survival systems of Grounded.

Those systems were designed for different games. Making them work together would require engineering, adaptation, and sometimes substantial compromises.

But modders have already demonstrated that meaningful elements of one game's behavior can operate within another game's environment.

The question is no longer simply whether such experiments are possible.

It's whether Xbox could make selected forms of interoperability repeatable, supported, and accessible to a much larger creator community.

Instead of every modder independently solving the same compatibility problems, participating studios could provide approved resources and interfaces for specific kinds of creation.

Some experiences might use only cosmetic assets.

Others might support custom scenarios, missions, maps, or gameplay rules.

More ambitious projects could integrate reusable behaviors and systems where the technical foundation permits.

Turning an experimental mod into a supported creation capability would still require substantial engineering. But the experiments provide working examples from which developers could begin.

The possibilities would expand as the tools matured.

The real opportunity isn't letting players move characters between games. It's allowing them to invent new experiences from the creative work that already exists.

Xbox's next-generation console, Project Helix, is being designed to support both Xbox console and PC games.

Microsoft has also described efforts to bring more of the Xbox experience into Windows while retaining the flexibility of the PC environment.

That suggests an interesting foundation for experimentation.

The traditional console model places substantial emphasis on controlling the software environment.

That control helps protect performance, security, compatibility, and the consistency of the experience.

PC gaming has historically allowed a different relationship between players and software.

Players can access modification tools, inspect files where permitted, install community content, and experiment with a wider range of development technologies.

A platform designed to bridge console and PC gaming could create an opportunity to reconsider how those approaches coexist.

What if Helix supported a dedicated creation environment alongside the conventional Xbox gaming experience?

Players could continue purchasing and playing professionally developed games as they do today.

But participating titles could also expose approved creative capabilities.

A player interested in Grounded might build an entirely new cooperative experience.

A Halo fan might create a custom challenge using supported environments and gameplay systems.

Someone with an interest in several franchises might combine approved resources into something that didn't previously exist.

And these creations could become discoverable through the Xbox platform itself.

The important distinction is that Helix would not need to make every installed game freely modifiable.

Nor would it require untrusted community code to operate inside the same environment as protected competitive games, personal data, or platform services.

A credible implementation would need isolation, permission controls, validation, and clear boundaries between official products and player-created experiences.

But those requirements describe the problems an architecture would have to solve.

They don't eliminate the possibility of the business model.

The next Xbox could remain a place to play premium games while also becoming a place where players make new ones from approved pieces of the Xbox universe.

One of the most interesting implications concerns the commercial life of Xbox's existing catalog.

A publisher traditionally evaluates an older game through sales, subscriptions, engagement, backward compatibility, and the potential demand for a remaster or sequel.

Those measures remain important.

But a player-creation ecosystem introduces another possibility.

An older franchise could remain culturally relevant because players continue creating experiences that use its characters, worlds, or systems.

Imagine someone discovering Killer Instinct because a community creator released a popular crossover fighting experience.

That player might become interested in the official game.

A Minecraft player could encounter Grounded through a creator-made adventure and decide to explore the original survival game.

A Halo fan might spend time with a community-created experience built around an older Xbox property they had never played.

These outcomes would need to be tested rather than assumed.

But the discovery mechanism is familiar.

Players already introduce one another to games through streams, videos, recommendations, mods, and shared experiences.

An authorized creation platform could make some of that activity easier to discover and sustain within the Xbox ecosystem.

And there's another possibility.

Traditionally, exclusive games have been one of the ways console manufacturers attract players to their hardware.

But imagine that DOOM vs. Halo experience becoming a breakout hit.

What if it were available only on Xbox hardware?

A creator could develop an experience compelling enough that people want an Xbox specifically to play it.

That possibility introduces a new dimension to the role of exclusive content.

Xbox would have to decide whether particular experiences should remain hardware-exclusive or be available more broadly across its console and PC ecosystem. Wider distribution could produce greater engagement, while a hardware-exclusive experience could provide a more direct reason to purchase the console.

Neither approach would automatically be the right choice for every creation.

But the existence of that choice is itself interesting.

And the effects could extend beyond purchases.

A player who creates something has invested time and imagination in the platform.

Someone who builds a successful experience may develop a community around it.

Other players might return because creators they follow are continuously releasing new content.

The platform becomes more than a library of products.

It becomes a place where new entertainment continues to emerge from the library itself.

That would not eliminate the need for professionally developed games.

In fact, those games could become even more important as sources of new worlds, systems, characters, and inspiration.

The studios create the foundation. The community creates additional possibilities. Both can contribute to the continuing value of the platform.

Roblox has demonstrated that player-created experiences can support a substantial economy.

That raises an obvious question for Xbox.

Could Xbox support a creator economy around approved intellectual property?

Perhaps a player creates a successful cooperative experience using assets from participating Xbox franchises.

Thousands of people play it.

Some return regularly.

Others share it with their friends.

The creation helps introduce new audiences to the franchises represented within it.

Should the creator have an opportunity to benefit from that success?

I think that's worth exploring.

But the answer doesn't have to be a copy of Roblox's monetization system.

Xbox could consider several approaches.

Some creations might remain entirely free, serving as community experiences.

Others might qualify for platform-funded rewards based on meaningful participation or engagement.

Certain approved creations could become commercially distributed products under agreements that define the rights of the creator, the contributing studios, and Xbox.

And some projects might be promising enough for further professional development.

These arrangements would have to be deliberate.

Ownership of a franchise does not automatically mean every related character, asset, voice performance, soundtrack, or technology can be reused without restrictions.

Rights may differ across properties and individual components. Competitive integrity, content moderation, accessibility, security, and creator compensation would all require clear policies.

Nor should every form of fan creativity be forced into commercial distribution.

Someone creating a funny crossover for friends has a different objective from someone attempting to establish a sustainable business as a game creator.

A healthy creation ecosystem should recognize both.

The commercial opportunity isn't to charge for every modification.

It's to support a wider range of creative participation and develop appropriate business models around the experiences that demonstrate lasting value.

Steam offers a useful comparison, though its approach is different from Roblox's.

Steam began primarily as software distribution and developed into a broader environment for PC gaming.

Over time, Valve added community features, player reviews, Guides, Workshop support, trading, broadcasting, and other systems that helped make the platform useful beyond purchasing and launching games.

Players could discover modifications, share knowledge, publish reviews, follow communities, and interact around a substantial library of games.

Steam's success cannot be attributed to those features alone.

Its catalog, pricing, distribution model, platform openness, and long history with PC developers are all important.

But its evolution demonstrates something relevant to Xbox's future.

The value of a gaming platform can grow beyond the transactions it facilitates.

Steam supports participation around games.

Roblox supports the creation and distribution of experiences within its own environment.

Xbox already supports substantial social, commercial, and cross-device gaming activity.

The proposed opportunity is to give creation a more prominent place in that relationship, using the established worlds and systems that distinguish its catalog.

This doesn't require Xbox to become Steam or Roblox.

It requires Xbox to determine what kind of platform it wants to be as the boundaries between playing, creating, and sharing continue to change.

The arrival of Xbox Labs makes this discussion timely.

The announcement acknowledges that technological developments are challenging assumptions the industry has relied upon for decades.

Games are increasingly capable of running beyond their original hardware.

Older software is being reconstructed and adapted.

Modders are experimenting with combinations of game mechanics and environments that were never intended to coexist.

AI-assisted tools may reduce some of the technical work involved, even though substantial engineering, testing, and creative judgment remain necessary.

These developments don't automatically create a business model.

But they invite publishers to reconsider what players might be able to do with games in the future.

For Xbox, the question is particularly interesting because it owns such a broad collection of established franchises.

The company could focus exclusively on using new technology to make existing games easier to access.

That would be valuable.

But what if accessibility were only the beginning?

What if Xbox also explored how its existing games could become foundations for new player-created experiences?

What if players could discover a character in one game, use approved tools to bring that character into another experience, and eventually create something entirely their own?

What if the Xbox catalog became not only a library of entertainment, but a library of creative possibilities?

Those are experiments worth considering.

And they could be evaluated incrementally.

Begin with a small group of participating properties.

Provide clear creative permissions.

Support selected assets, behaviors, and creation tools.

Allow players to publish experiences within controlled boundaries.

Observe what people build, what other players choose to experience, and whether those creations generate meaningful engagement or commercial demand.

Expand only when the creative results and operating economics justify it.

A platform-wide creation ecosystem would require serious investment.

But Xbox wouldn't need to promise the entire vision before beginning to test its underlying proposition.

Project Helix will arrive in a gaming industry that looks different from the one Xbox entered in 2001.

Players have more hardware choices.

Games increasingly reach multiple devices.

Digital libraries, subscriptions, communities, and social relationships can extend beyond a single console.

Meanwhile, platforms such as Roblox have demonstrated that player-created experiences can command enormous amounts of attention.

That raises a question about what distinguishes a gaming platform when access to individual games is no longer sufficient to define the entire relationship.

Hardware still matters.

Performance matters.

Great games matter.

But so does what players are able to do around those games.

A platform that supports creation can offer a different kind of attachment.

A player may spend hundreds of hours building something.

Other players may spend thousands of hours experiencing what the community has created.

That activity can generate friendships, reputations, communities, discoveries, and future opportunities.

And its value may continue long after the original game or creation tool first attracted the player.

Xbox already has decades of creative work upon which to build.

It also has players who have spent decades developing traditions around those games—competing, learning, sharing, creating, modifying, and finding new ways to participate.

What if Xbox treated that culture as one of the central opportunities of its next generation?

Not by abandoning the professional games that made its franchises valuable.

Not by turning every game into a creator marketplace.

And not by promising unrestricted access to intellectual property.

But by giving players more opportunities to build upon the worlds Xbox chooses to make available.

Roblox demonstrates what can happen when creators provide a continuous supply of experiences.

Steam demonstrates how a platform can become valuable through the activity surrounding its catalog.

And the growing sophistication of modding shows that players are increasingly capable of doing things with existing games that once required specialized development teams.

Xbox has an opportunity to bring those ideas together in a way that reflects its own history and strengths.

The result wouldn't simply be another place to buy and play games.

It could be a platform where Xbox's existing worlds become the starting point for experiences nobody at Xbox has imagined yet.

And where the people who have spent decades playing those games have a new opportunity to help shape what comes next.

• Xbox Wire — Introducing Xbox Labs, October 13, 2026
• Xbox Wire — Building the Next Generation of Xbox, March 11, 2026
• Roblox — Fourth Quarter and Full Year 2025 Shareholder Results
• Roblox — 2025 Annual Report
• Matthew Ball / Epyllion — The State of Video Gaming in 2026
• libsm64 — Super Mario 64 Movement and Rendering Library
• ER Mario — Elden Ring × Mario Mod Technical Overview

The cross-franchise creation systems, intellectual-property permissions, commercial structures, and proposed role for Project Helix discussed here are independent strategic proposals. They are not announced Xbox Labs capabilities or Microsoft product commitments.