For over a decade, Google's Play Store stood as the unchallenged gateway to Android's vast ecosystem, shaping how billions of people discovered and installed software. A years-long legal confrontation between Epic Games and Google has now forced that gate open: Aptoide Games, a rival app marketplace, is available directly within the Play Store itself — the first competitor to enter through the front door. The moment reflects a broader reckoning with how a handful of platforms came to govern the digital commons, and whether antitrust law can meaningfully restore the openness that mobile computi