I am developing an app with lots of achievements. The order in which achievements are displayed in Game Center is somewhat relevant, for readability reasons. As new versions of the app become available, I'm adding new achievements. Now, the standard approach to change the order of achievements is to drag them around in the iTunes Connect interface, as this answer suggests.
However, as this other question points out, this doesn't always work, and if you try you get a message like "Failed to update sort order. Please try again."
(I never succeeded). The mentioned question was closed as off-topic for being a question about "general computing hardware and software".
So, let me rephrase the question from a programming point of view:
- Is there any programmatical way to change the order in which achievements are displayed in Game Center or,
- once an app goes live, is there simply no way to change the order?