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.

On Monday, May 19, Judge Yvonne Gonzales Rogers issued a court order for Apple to reinstate the game (or prove that it had a legal reason not to do so), and 24 hours later, Fortnite was back on iPhones,