The iOS Game Center has the ability to send to a game a list of the player's unlocked achievements as an array. This would be very useful in cases where players play the same game across multiple devices. And it frees the Stencyl developer from saving achievements in a local save file, which is more vulnerable to loss. Yes, Game Center is always tracking achievements, but currently, as best as I can tell, there's no way to have a game query GC for the status of a particular achievement. Best you can do is show the GC generated list of unlocked achievements.
I'd be curious if anyone can estimate how long it might take to create this functionality, as I might be willing to throw a bounty at it.
