A report earlier this week seemed to suggest that Epic's Fortnite Battle Royale for Android could actually be launched outside the Google Play Store. For the most part all apps are typically launched via the Play Store for a variety of reasons, such as security, reassurances that it won't be malware (for the most part), consolidation, ease of updates, and more.
This is a strange move, but a move that has since been confirmed. In an email to The Verge, Epic's CEO Tim Sweeney said, "Epic wants to have a direct relationship with our customers on all platforms where that's possible. The great thing about the Internet and the digital revolution is that this is possible, now that physical storefronts and middlemen distributors are no longer required."