private void UnlockAchievement(ACHIEVEMENTS ach)
{
Achievement achObject = allAchievements[(int)ach];
// if not already unlocked or queued to unlock
if (!unlockedAchievements.Contains(achObject))
{
achObject.AttemptUnlock();
unlockedAchievements.Add(achObject);
NotifyAll(gameObject, OBSERVER_EVENT.UNLOCKED_ACHIEVEMENT);
}
}