Alphabet, Google’s parent company, faces numerous legal challenges in the US that, together, threaten its core business.

While Android has always allowed users to sideload applications from other sources, Google was found to have used its market power to kneecap all recent attempts to build third-party app stores. Judge James Donato says Google must undertake major efforts to address this behavior that could remake the mobile app landscape.

An injunction was issued after Epic Games won an antitrust lawsuit—the latest legal blow to the search giant.