A new court filing has revealed that Apple sued Valve Software in November 2020 in connection with its ongoing litigation with Epic Games. Epic wants data on Steam's sales and business operations because "it is a direct competitor to the Epic Game Store" but, unhappy with the request, Valve has yet to fully cooperate and refuses to provide information Epic insists "not to increase the risk of any harm to competition." The subpoena, which was made public via a joint discovery letter, was issued in the hope that Apple could collect information about how Steam works for use in the proceedings. However, while Apple and Valve "have met and spoken by phone and corresponded in a good faith effort to resolve outstanding disputes," "the parties were unable to reach an agreement." "Valve has already produced documents on its revenue sharing, competition with Epic, Steam distribution contracts and other documents," the company said, but estimates that the request to provide "six years of PC game and item sales for hundreds of third-party game videos, and then producing a large amount of sensitive information about those games and Valve's revenue" is unreasonable. Epic Games launched its legal fight against Apple last year after its hit battle royale title, Fortnite, was pulled from the iPhone app store. Apple justified its action by claiming that Epic broke its agreements with Apple after allowing players to purchase VBucks, the in-game currency, through channels other than the App Store, avoiding the need to give the tech giant a cut in revenue. The ban prevents 116 million of its 350 million players from accessing game updates, so Epic has led the fight in courts in the US, Australia, the UK and now Europe to get it lifted.