In March of this year, Apple officially launched the Apple Arcade game subscription service. It’s been a short time since its promised fall launch, and before the launch, Apple is trying to attract potential developers to join the subscription service. Since March, Apple has sent invitations to developers in a variety of forms, and now developers are starting to receive email invitations from Apple.

This is the first time Apple has invited developers to join Apple Arcade via email. In the email, Apple mentioned: "In March of this year, we launched Apple Arcade, the world's first game subscription service for mobile, desktop and living rooms. We are working closely with some of the world's most innovative game developers. Collaborate to bring their games to Apple Arcade. If you're developing a groundbreaking game and want to add it to Apple Arcade, we'd love to hear from you."

It's worth noting that games offered through Apple Arcade will not be available outside of the subscription service, which is why Apple specifically mentions that only unreleased games can be added when recommending to developers. With Apple Arcade, developers will be rewarded based on when users play games, and Apple will provide early-stage funding for developers to develop Apple Arcade games.

In the fall of 2019, Apple Arcade will be launched in more than 150 countries around the world, and will be available in the App Store as a new tab, available on iOS, macOS and tvOS. Apple promises that every game in Apple Arcade offers a full-featured experience, including all game features, content, and subsequent updates, so players don't have to pay for anything at an additional cost.