sentences:  Learning the Nazis had begun digging deep into crystal mines to obtain more of the very same medallion Blazkowicz found, the OSA sends their operative to the fictional town of Isenstadt, which the Nazis had taken complete control of in order to excavate rare Nachtsonne crystals necessary to access the "Black Sun" dimension.It was developed by Raven Software, produced by id Software and published by Activision, and released in 2009 on three major platforms.