Google has started distributing third-party app stores through its Play Store in the United States, beginning with Aptoide Games as the only option. Users can find these stores via specific links or searches, but they will not be prominently displayed. Google will enforce its Play Store policies on these platforms but will not review every app or oversee updates and payments. Aptoide Games specializes in games and allows users to download apps like "Clash of Kings" with minimal security measures.