Epic Games founder and chief executive Tim Sweeney said Apple's control of its platform had tilted the level playing field.
"The 30 per cent they charge as their app tax, they can make it 50 per cent or 90 per cent or 100 per cent. Under their theory of how these markets are structured, they have every right to do that," he told reporters.
"Epic is not asking any court or regulator to change this 30 per cent to some other number, only to restore competition on IOS," he said, referring to Apple's mobile operating system.
The company also accused Apple of barring rivals from launching their own gaming subscription service on its platform by preventing them from bundling several games together, even though its own Apple Arcade service does that.