Returns the number of completed achievements for the comparison player.
total, completed = GetAchievementComparisonInfo(achievementID)
- number - ID of the achievement to retrieve information for.
- number - Total number of achievements currently in the game.
- number - Number of achievements completed by the comparison unit.
- Does not include Feats of Strength
- Only accurate after the after SetAchievementComparisonUnit is called and the INSPECT_ACHIEVEMENT_READY event has fired.
- Inaccurate after ClearAchievementComparisonUnit has been called.