Returns the previous achievement for an achievement which is part of a series.
Returns the previous achievement for an achievement which is part of a series.
Signature:
Code
previousID = GetPreviousAchievement(id)
Arguments:
id - The numeric ID of an achievement (number)
Returns:
previousID - If the given achievement is part of a series and not the first in its series, the ID of the previous achievement in the series; otherwise nil (number)
