Now that Fortnite is back on iOS with Apple's approval of the game, Microsoft is jumping in to try to extend its ability to sell games on the platform through its Xbox app.Microsoft on Tuesday filed an amicus brief in district court in support of Fortnite publisher Epic Games saying that Apple has "stymied" its efforts to sell games through its mobile Xbox app on iOS.

Fortnite returns on iOS in the U.S. after a 5-year ban. Learn how to download it, what devices are supported, and more here.

The popular video game Fortnite has returned to the iPhone app store in the U.S., ending a prolonged exile that was triggered by a legal showdown over the lucrative fees that Apple had been collecting for years through a payment system that it has been forced to change.