Epic Games' store is available to Android phone users worldwide and iPhone and iPad users in Europe.
The store's launch comes after Epic waged legal battles and lobbied regulators to loosen Apple and Google's grip on the sale of apps for phones running their operating systems.
A new EU law known as the Digital Markets Act (DMA) has forced Apple to open its doors to app developers in Europe, but the US firm is not doing so elsewhere.
"We're very happy to be on the cusp of releasing our iOS and Android games, made possible by the new European DMA law," Epic CEO Tim Sweeney said at a press conference from the company's office in Sweden.
Fortnite is also returning to iPhone and iPad after being banned in 2020 for attempting to circumvent Apple's payment systems.
To attract app developers to its platform , Epic is offering them better revenue-sharing terms than Apple or Google.
However, Epic said that Apple and Google do not facilitate with a long and opaque procedure to install their app store and are disadvantageous for developers to collaborate with them.
Epic has set a goal of installing 100 million apps in its app store on Android and iOS devices by the end of the year.
"The only thing that's going to stop us is going to be the hurdles that Apple and Google are going to put in front of us, and they're pretty significant," said Steve Allison, head of the Epic Games Store platform.
In addition to Fortnite, Rocket League Sideswipe is also available on the store, as well as Fall Guys, which is making its first appearance on mobile devices.
"This is just the beginning of a long effort to bring our games back to all of these platforms around the world, and the fight won't end until Fortnite is back on iOS everywhere and without Apple's taxes," Sweeney added. | BGNES