Video game developer, Epic Games filed a civil antitrust lawsuit against Apple after it removed Epic’s Fortnite from the app store today.

This comes after Epic Games provided a direct challenge to Apple and Google’s payment rules in their app stores. This would allow customers to purchase digital items directly from Epic rather than Apple and Google taking a 30% cut of sales inside apps.

Fortnite is one of the top games in the world with $1.2 billion in spending on the App Store to date and 2.4 million installations on the App store in the past 30 days.

Epic Games had this to say following the lawsuit filing:

Apple’s removal of Fortnite is yet another example of Apple flexing its enormous power in order to impose unreasonable restraints and unlawfully maintain its 100% monopoly over the iOS In-App Payment Processing Market.