"Fortnite" video game maker Epic Games on Monday accused Alphabet's Google and Samsung , the world's largest Android phone manufacturer, of conspiring to protect Google's Play store from competition.

The “Fortnite” maker claims the tech giants colluded to place onerous restrictions on app stores created after Google lost an antitrust case.

While it’s turned on, it automatically keeps users from installing apps unless they come from “authorized sources” — namely, Google and Samsung’s app stores. Epic claims there’s no process for any rival store to become “authorized.