Disgaea 4: A Promise Unforgotten is a sequel to Disgaea, a hardcore, turn-based strategy RPG popular on the PlayStation 2 and PlayStation 3. In Disgaea, character units have a limit on their movement and attack ranges, based on their level and weapons equipped. There are other special game factors that let you take advantage of the 3D battle maps, many of which are unique to Disgaea. As the 4th installment in the series, Disgaea 4: A Promise Unforgotten adopts an all-new graphic engine with a far greater emphasis on anime-style graphics and adopts many new game systems to make this the most epic Disgaea adventure yet!