Epic Games tells judge how Google should fix its antitrust charge. Google isn’t pleased.

In December, a nine-person federal court jury unanimously handed North Carolina’s largest video game developer, Epic Games, a massive victory in its years-long antitrust fight with Google. The jury determined Google’s Android app store has been propped up by anti-competitive obstacles that harmed smartphone app developers and consumers. At the heart of the case was the payment system of the Google Play Store, a platform hundreds of millions globally use to download apps on Android devices. What remedies Google must take is up to U.S. District Judge James Donato, who...