Disgaea 4: A Promise Unforgotten is a tactical RPG and the fourth installment of the Disgaea series by Nippon Ichi Software. Using turned based combat and the isometric battlefield gameplay from the previous installments, Disgaea 4 includes new features, such as the Magichange system.

Disgaea 3: Absence of Justice is a tactical RPG and the third video game in the Disgaea series by Nippon Ichi, and the first to be released on the PlayStation 3. Like previous installments, battles are performed on isometric maps with a group of characters. The newly added "magichange" system allows monsters to transform into specific weapons in which a partner can use to execute a strong technical attack.