Disgaea is a pretty good turn-based strategy game. The graphics are a little ancient for a PS2 game but they do the job well. You play the role of Laharl who wants to regain his place (as that of his father) as the ruler of the Netherworld. Together with his trusty (and far more intelligent) sidekick, Etna, he sets off to challenge the denizens of the Netherworld.
I admit that I'm no fan of strategy games. They can be quite tedious and require a lot of time and planning. However, Disgaea's plot and utterly hilarious one-liners make the game a lot easier to digest and enjoy. The game itself is already very good but together with the excellent script poured in, Disgaea makes for an enjoyable experience.
The game allows Laharl to find and develop a group of accomplices which he can use in his struggle. The manner in which this is accomplished is by a complex way of election, voting and simply being bureaucratic (i.e. sucking up where it counts). It attempts to mimic what we perceive as governments today and it does so quite well.
My only complaint is that the game can take some getting used to. There's quite a bit of learning which you should be prepared for. However, once you've familiarised yourself with the way the game works, its mechanics and terms, you'll soon appreciate the joy that is Disgaea. It may take some time but it's quite worth it.