Static data describing an achievement.
Retreive the achievement descriptions by using Social.LoadAchievementDescriptions. GameCenter: These are stored server side and should be fetched when the user has authenticated. These are set in the iTunes Connect.
| achievedDescription | Description when the achivement is completed. |
| hidden | Hidden achievement are not shown in the list until the percentCompleted has been touched (even if it's 0.0). |
| id | Unique identifier for this achievement description. |
| image | Image representation of the achievement. |
| points | Point value of this achievement. |
| title | Human readable title. |
| unachievedDescription | Description when the achivement has not been completed. |