Despite its unearthly difficulty, Order of Ecclesia is arguably the best Castlevania game since Symphony of the Night. If there is one DS game that shouldn't be missed in 2008, it's this. The shelf life is also quite considerable, thanks to extras like a boss rush mode, wireless/WFC race, and shop mode-in addition to the multiple playthroughs that the game demands.
As of this writing, however, the action is still a bit hard to come by over at WFC. The Nintendo DS may have a fair number of good games this year, but not this good. Castlevania: Order of Ecclesia is a must-own, must-play, and must-finish sort of game.