This game strictly follows in the footsteps of Disgaea: Hour of Darkness, the original hit game for the PS2. Almost everything is the same, with extra bits of storyline for those players who play beyond the game itself. Slight alterations such as the voices of memorable characters from the first game are also noticeable differences between the two games.

The main characters of the story are the same as before. Laharl, Etna, Flonne, Gordon, and the rest of the bunch that you know and love.

The additions to the game and extra storyline makes this game worth buying, if you are a big fan of the Disgaea, otherwise, you would be better off playing the original.

Extras include the additional Demonhall Mirror map in which you face the main characters of Disgaea 2, along with some very powerful overlords and strong solo units, to the demons in your castle. With the addition of Adell, Rozalin and Zetta from Disgaea 2, the parts in the story prior to the events that actually take place in Disgaea 2 connects the two worlds in a different time period. Something fans of the series will enjoy.