I would like to add additional achievements to my game when the player buys an add-on (additional levels for example). Does anyone know how to do this for Game Center, Google Play, and GameCircle?
reading the Game Center docs, it looks like sending an unlockAchievement call with a percentage of 0 will unhide a hidden achievement. This may be the way to go, but I do not believe you can pass a percentage to Google Play at this time. Not sure what happens when you pass 0 to a hidden achievement in Amazon GameCircle at all.
Anyone ever go through this? I would like to have the achievements listed for this add-on only when purchased.
thanks!