Roblox Corporation (NYSE:RBLX) shares are trading lower Wednesday after Alphabet Inc. (NASDAQ:GOOG)‘s Google and Unity Software Inc. (NYSE:U) announced a strategic partnership on a new AI gaming platform.

Google’s Playground Lets Anyone Build Games From a Text Prompt

Google’s experimental Playground platform lets users generate and customize playable games from natural language prompts, with no coding required. Later this year, Google and Unity will introduce Unity Spark, a new product built on Playground. It will keep an accessible interface while adding professional-level mechanics, high-fidelity 3D capabilities and the Unity runtime, so creators can start with a simple prompt and grow into more complex games.

The platform is built to plug into Google’s ecosystem. Users can log in with their Google Play Games profile to get leaderboards, multiplayer matchmaking and community features from day one. Public creations include sharing and liking features, and Google said it will promote standout Playground games across its network.

Why the Partnership Is Weighing on Roblox

According to Investing.com, investors are treating the new platform as potential competition in the user-generated gaming market, where Roblox is a leader. Roblox’s model depends on a large base of creators building games that attract players. Playground and Unity Spark target the same cycle: lower the barrier to creating a game, give creators a large audience through Google’s products, and keep players engaged through built-in community features.

Roblox has been building its own AI creation tools, including Build, a text-to-game feature launched in July, and added more generative AI features for developers in September. This isn’t the first time a Google AI gaming launch has hit the stock. Roblox fell 8% in January after Google unveiled Project Genie, an AI world-creation tool. Unity shares rose about 5% on the news.

Roblox Shares Edge Lower

RBLX Price Action: At the time of writing, Roblox shares are trading 0.11% lower at $45.51, according to data from Benzinga Pro. The stock is well off the lows for the session.

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