So back in the day I remember downloading a rom from (I believe) the now defunct romnation.net. Some platform's roms on there, such as the Gameboy's, used to come with all localizations + maybe some pre-patched romhacks bundled into a .7z file. Link's Awakening was one such game with an incredibly edgy hack of the game filled with vulgar, racial, sexual, etc. language. Anyone maybe know what I'm talking about? Source: almost 2 years ago

Anything you put elsewhere is not more secure, unless you are more secure than Apple's servers, which seems highly unlikely. If you don't have it, it can't get compromised. The user has an iCloud account, you can write to iCloud storage without making them "sign in" to your app. It's their data, they can find it in the folder for your app in their iCloud drive on a Mac. And see... - Source: Hacker News / 25 days ago

Why do you need them to have an account? What on your roadmap requires it? And perhaps you could leverage Game Center accounts for "play" data, which leverages Apple's sensitivity to provide privacy while allowing achievements, multiplayer, and turn-based games, between partners. https://developer.apple.com/game-center/. - Source: Hacker News / 25 days ago

u/JTostitos is right though that Game Center was designed for this although it has gone out of style with many game studios lately. But it all depends on how the game is designed... If you require constant client-server communications then implementing Game Center doesn't really make sense when you can easily roll your own leaderboard on the server. Source: about 2 years ago