Epic's antitrust lawsuit was filed against Apple earlier this month
Judge said she viewed Epic's request through "two lenses"
Fortnite maker alleges Apple has engaged in anti-competitive behavior
Apple removed Fortnite after Epic rolled out its own in-game purchases
A federal judge on Monday blocked Apple from shutting down an Epic Games tool that is relied upon by hundreds of other app makers but had become the subject of an antitrust battle between the companies.
The ruling safeguards Fortnite creator Epic's computer graphics software Unreal Engine, which it offers through an affiliate business and which hundreds of games and other apps use to power their apps on Apple's iPhones.
"Epic Games and Apple are at liberty to litigate against each other, but their dispute should not create havoc to bystanders," Judge Yvonne Gonzalez Rogers wrote in a ruling late on Monday.
The legal battle arose after Apple this month removed Epic's Fortnite game from Apple's App Store and an affiliated account, effectively blocking distribution of Unreal Engine, when Epic rolled out its own method of in-game purchases in Fortnite rather than using the required Apple system that charges commission of between 15 percent and 30 percent.
Epic then alleged in a lawsuit and social media campaign that Apple has engaged in anti-competitive behaviour by abusing its dominance in the market for iPhone apps, marking the highest-profile challenge to app store business.
Epic had sought to reverse its punishments by Apple until the broader case could be decided.
Gonzalez Rogers said "the current predicament (with Fortnite) appears of its own making" and refused to order its reinstatement. But she allowed Unreal Engine to continue powering iPhone apps, saying that Apple's actions against Epic's affiliates had been too severe because they had not breached the iPhone maker's policies as Fortnite had.
During a terse exchange with Apple counsel Richard Doren at a hearing on Monday, the judge said she saw "no competition" to Apple's App Store on the iPhone.
"The question is, without competition, where does the 30 percent (App Store commission) come from? Why isn't it 10? 20? How is the consumer benefiting?" she asked.