For those of you unfamiliar with the Disgaea franchise, it is a turn based tactical RPG much along the same vein as Final Fantasy Tactics or Fire Emblem. Your team of 10 characters, made up of your choice of feature characters or customized characters, take turns moving about a battlefield unleashing attacks and spells upon each other. The game has a sizeable main plot, but the amount of time you can spend playing this game is virtually unlimited as the game can randomly generate new levels for you to play infinitely and your character will only reach 'maximum level' if you play this game far, far more than anyone should play any game.
For those of you familiar with the series, Disgaea 4 lives up to your expectations. It has the same sense of humor, colourful characters, and customization of the rest of the series. The Magichange system is back from Disgaea 3 but improved to make it more of a useful and viable option. Monsters have also been expanded by allowing two of them to 'fuse' together to make giant sized monsters. As an added bonus, you get to see many of the characters from previous Disgaea titles show up and join the team, though most of those appear after the main plot finishes.