Fortnite creator Epic Games has taken another step in its ongoing battle with Apple.

On Friday, Epic Games doubled down on its request for a preliminary injunction that would require Apple to put its beloved video game back in the App Store. In a California court filing, the gaming company refuted a number of claims made by Apple, including one that suggested gamer interest in Fortnite was fleeting. 

Apple removed the Fortnite app in August after the gaming company violated Apple’s rules by introducing a direct payment option into the game without Apple’s approval. That payment system would have competed with Apple’s in-app purchase system, which the iPhone giant requires all apps to use.  

Typically, when players on iOS devices make in-app purchases, Apple gets a 30% cut of those sales. Fortnite’s direct payment functionality undermined that structure. 

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