Amid reports of numerous compatibility issues from developers including Capcom and Konami, Telltale Games has taken the unusual step of removing most of its library of games from the iTunes App Store.
Currently unavailable are the iOS versions of The Walking Dead, The Walking Dead: Season 2, The Wolf Among Us, Back to the Future and Jurassic Park. Game of Thrones and Tales From the Borderlands appear to be unaffected.
Telltale says in a post from its Support Center that the iOS 9 issue is causing sounds from the games to disappear, and that sometimes the games freeze or crash. The support team is working on the problem right now, and hope to have it resolved "in the near future." (i.e., don't be surprised if it's not today). The only way to fix the problem right now is to downgrade to iOS 8 or below.
You can still continue to play these games on your iOS device while the fix is being worked on, but be aware that the problems listed above can happen at any time. If you've never bought any of these games but would like to, that won't be possible until the fixes are implemented. If you've purchased one of Telltale's games in the past but don't have it installed on your device at the moment, you can still re-download it from the "Purchases" section in the App Store app.