I beat
Soul of Darkness, a DSiWare title downloadable from the 3DS eshop.
It is a Castlevania clone in just about every conceivable way. You play as a vampire hunter who is hunting the vampire that has captured your lover. You travel through 11 linear stages fighting ghosts, zombies, werewolves, and other beasts appropriate for the setting. Graphically I'd say the game is almost on-par with the DS Castlevania's; however, the music is really bland.
Soul of Darkness has more in common with the earlier CV's but does have a bit of "Metroidvania" design in the stages. There are branching paths that lead to power ups and those power ups increase your health and magic levels (probably a good idea to go after those).
Overall, the game was fairly easy. After you beat the game you unlock Hard Mode but there's no real replay value as I don't believe there are any other changes or unlockables to Hard Mode.
If you're a die-hard CV fan I'd say this is worth checking out. The game is fairly short but I felt is was well worth the four or five dollar admission fee.
**Images shamelessly linked from nintendolife.
