Roblox puts AI game creation on phones

Roblox is bringing text-to-game creation directly into its mobile app. Announced on Wednesday, the new Build tab lets users generate a basic playable game from a text prompt, without opening Roblox Studio or writing code.

A creator can type a prompt such as a cozy forest adventure with environmental obstacles, and Build will assemble a starting experience with gameplay mechanics, environments, characters, sound, and visual style. The feature enters public alpha in New Zealand on July 28 for age-verified users aged nine and older.

Build uses the same back end as Roblox Studio, so projects started on a phone can be picked up later on desktop with the full Studio toolset. Roblox also said creators will be able to launch agents from Studio and monitor progress from mobile.

The system runs on a mix of open-source and proprietary Roblox AI models trained on what the company says is a large dataset of 3D models and game-specific data. Roblox’s Cube foundation model, introduced earlier this year alongside agentic Studio tools, can generate game-ready objects that already know how to drive, shoot, or otherwise behave as expected without manual scripting.

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Roblox said it is aware that making game creation easier could also flood the platform with low-quality releases. The company says its discovery system ranks games by long-term retention, not by recency or upload volume, so titles that fail to attract players should not rise to the homepage. Games published through Build will face the same safety checks and retention-based discovery ranking as other Roblox experiences, while games aimed at younger users will get an extended review before appearing in the Roblox Kids or Select catalogs.

Alongside Build, Roblox said it will release more agentic tools for professional creators in the coming months, including:

• a playtesting agent to find bugs before players do
• an analytics agent that answers performance questions in plain language
• an experiment agent that suggests tests to improve engagement and monetization

The company is also developing a scene-generation model that can create fully editable, playable 3D environments from a single text prompt.

The launch lands as AI-generated content is overwhelming moderation systems across platforms. The source points to an 84 percent jump in App Store submissions, which led Apple to crack down on low-quality AI-built apps. Roblox is betting that retention-based discovery will act as the quality filter instead. A basic version of Build will be free, with paid options for power users. Roblox says the rollout will expand beyond New Zealand after the alpha. With 132 million daily active users, the company is opening mobile game prototyping to a massive audience.