The fourth entry in [[Nippon Ichi]]'s popular strategy RPG franchise [[Disgaea]], with the storyline taking on heavy political undertones. The battle system from [[makai senki disgaea 3|Disgaea 3]] is vastly improved upon and expanded, such as: 

* Updated graphics 
* Faster combat
* Shorter Item World stages
* Reverse Pirating
* A brand new Chara World to build up characters' aptitudes
* The return of Magichange, plus introducing Fusion, where two monsters combine into one
* Challenging X-Dimension versions of regular stages
魔界戦記ディスガイア4 ディスガイア4