Roblox is putting a game-creation tab inside the same mobile app people use to play. Build will take a text description, generate a basic playable game, and let the creator refine, test, share, or publish it without first opening Roblox Studio on a computer.

Select Build features, including publishing, enter public alpha in New Zealand on July 28. The test will be open to age-checked users 9 and older, while games that pass Roblox’s safety checks will initially be playable worldwide by age-checked users 16 and older.

Roblox calls the output a “basic game.” It has not yet published the alpha’s limits for game complexity, editing, or reliability.

From a sentence to a playable starting point

Roblox’s example prompt asks for a cozy adventure in a dense forest with environmental obstacles. The company says Build can generate gameplay mechanics, an environment, characters, visual style, and sound, then keep the result inside a loop of prompting, refinement, playtesting, and sharing.

Build uses a mix of open-source models and Roblox’s proprietary models, according to the company’s product post. Roblox says its models are trained on 3D and game-specific data and can produce functional objects and scenes that connect to its existing creation tools.

A playable draft needs more than an image or mesh: it needs rules, object behavior, a scene, and a path through the game. Roblox has not published examples showing how long those rules remain coherent, how many systems can interact, or how creators recover when a generated mechanic breaks.

Mobile is the entry point; Studio remains the full tool

Roblox Studio currently provides the detailed desktop workflow for building, scripting, testing, and publishing. Roblox describes Build as an extension of Studio. The two products share a back end, models, and chat history, so a creator can begin on a phone and continue in Studio.

The connection also works in the other direction. Roblox says creators will be able to launch agents from Studio and check their progress from a mobile device. A creator could start a game on a phone, continue in Studio, and later monitor an agent from the phone.

Roblox has not said whether mobile creators will be able to inspect generated Luau scripts, browse the complete data model, review asset provenance, compare revisions, or view a project history before moving into Studio. The extent of mobile editing therefore remains unclear.

Three agents are planned for the production loop

Roblox plans to add playtesting, analytics, and experiment agents across Build and Studio over the coming months.

  • The playtesting agent is intended to find bugs before players encounter them.
  • The analytics agent will answer questions about a game in plain language instead of requiring a creator to search dashboards.
  • The experiment agent will propose tests aimed at engagement, retention, and monetization.

These agents extend work Roblox announced in April. At that time, the company said 44% of its top 1,000 creators had used Roblox Assistant or third-party AI tools through Studio’s MCP support during a March 6–April 7 measurement window. Roblox defined the top group by Robux spent in their experiences, so the figure describes established commercial creators rather than the whole creator population.

The April release also introduced an agent that can examine code and the game data model, read logs, control a player character, and test behavior against a plan. Roblox now plans to make agents available across Studio and its mobile app.

Roblox also has Cube and Procedural Models for 3D assets

Roblox is pairing Build with its existing generation tools. Cube turns prompts into 3D objects, including functional vehicles and weapons. Procedural Models produce parameterized assets that creators can reshape without regenerating the entire object. Roblox also says a forthcoming scene model will generate editable, playable 3D scenes from one prompt.

Cube supplies individual objects, while the planned scene model arranges a playable space. Build must connect those outputs to mechanics, goals, feedback, and publication. The July alpha will reveal how much of that process works in a mobile session.

The alpha opens at age 9, while published games start with a 16-plus audience

During the New Zealand alpha, age-checked users 9 and older can access Build. Published games that clear Roblox’s safety checks will initially be available worldwide only to age-checked users 16 and older.

Build games need an additional review before they can enter the Roblox Kids or Roblox Select catalogs for users under 16. Roblox says they will then join the same candidate pool and use the same retention-based discovery system as other games. The company has separately said its discovery changes prioritize long-term player value through measures including retention, co-play, and spending.

Age-checked users 9 and older may create during the alpha, but their published games initially open only to age-checked users 16 and older. Prompt generation also provides no shortcut into recommendations: Build games enter the same candidate pool and are ranked by the same retention-based system as other games.

The base version will be free, with paid options still undefined

Roblox says a base-level version of Build will be free and that additional paid options are planned for power users. It has not disclosed prices, generation quotas, model choices, storage limits, or which creation and agent features will sit behind payment.

The company plans to expand Build to more creators and regions over the following months. Ages and availability may vary by region, and Roblox warns that the final features and appearance may change.

What remains unproven before July 28

Roblox has not released Build for independent testing. The public alpha will provide the first evidence beyond the company’s example workflow and product images.

The open questions are whether mechanics survive repeated edits, whether state persists through a longer play session, whether generated assets and scripts remain inspectable, and whether a creator can repair one broken system without replacing the rest. The alpha will also show how Roblox explains safety review and publishing limits to creators as young as 9.

Until then, Build is a detailed product promise with a dated public test—not yet evidence that a phone prompt can produce a durable game.

This article was written with assistance from Wonder Bricks AI Agent and edited by SunnyLabs.