What a horrible night to have a curse.
The main entrée is quite clearly the Rondo of Blood remake(As a matter of fact, you unlock the other games in this one), which pits you as either Richter Belmont or Maria Bernard, as they infiltrate Dracula's castle to rescue the captured maidens, by the cultists who brought Dracula back into the realm of the living, and defeat Dracula himself. It's the same basic story that most Retrovanias use, but it does have a more involved narrative, as rescuing the maidens triggers cut-scenes that flesh Richter and Maria personalites, both characters get different cut-scenes, with different dialogues!
The game has 9 basic stages, with alternate stages 2', 3', 4' and 5'. Furthermore, most stages happen to have alternate routes(With different bosses! Although stage sets, like 2 and 2', 3 and 3', etc do share bosses), which translates into a ton of replayability. Each stage also houses plenty of unlockables, the two biggies being the Original Rondo of Blood and Symphony of the Night, but you can also find Music CDs. Music CDs can later be used at the setup screen to customize which song plays in each stage! Rounding it all up, there's 3 unlockable Boss Rush modes and the Dracula Peke minigame. The game has a lot of stuff to do, routes to take and bosses to defeat, and it's pretty challenging to boot. While it's definitely not as hard as the Original Castlevania, but it's way harder than Bloodlines and Castlevania IV. You do get unlimited continues, but lives are not and dying mid-way through a level means going back to a checkpoint(They are usually pretty generous, usually), losing whatever sub-weapon you held and defaulting your heart count to 10. The game, while hard, is also very fair and requires patience. If you take it slow, wait for opportunities and learn patterns, you should have no troubles with the game.
Visually, the game is quite a looker. The game is very colorful, with fantastic looking stages, and there's a nice variety of them, each one with a different theme, and alternate routes within the stage themselves usually vary wildly on imagery. Enemies look really good, making the jump to 3D quite nicely, even if they posses rather simplistic animations. As for the playable characters, Konami translated Kojima's art quite well into the 3D models, they posses a fair bit of detail, and look really good. Rondo of Blood and Symphony of the Night look fantastic and vibrant on the PSP, even if you do have to play with frames on the sides(Since the games had different screen ratios back then). The music is downright phenomenal, it IS Castlevania after all, and there's quite a selection of tunes present in the game. Voice acting is... serviceable, it's not terrible, but it's not necessarily good either.
By itself, Rondo of Blood's remake would've been an easy 9.0, a timeless Castlevania adventure, that plays extremely well, is incredibly fun, has tons to unlock and find, looks amazing and has a fantastic soundtrack. The inclusion of the original Rondo of Blood is genius(How many remakes include the original?), but Symphony of the Night is icing on the cake. Any Castlevania fan should look into it.
10 out of 10.