As a huge RPG fan (and a long-time lover of & supporter of NISA (and other similar) games); I'm sure that I'm a bit more biased than most...and I'm also sure that I'd rate/review/"*Grade*" these games in a more forgiving light and much more leniently than others might...
...SO, w/ that said, I'll just be listing some particular, exclusive PS3 RPG's that I've bought/played --*BUT*-- I will
*INTENTIONALLY* be refraining from offering any of my opinions concerning the quality of them
NOTE: The games I'll be listing will be
"PS3-Exclusive" only in that they're not on the 360...I really know very little about which of the following may have/may have not also had PC releases/versions...
Disgaea 3: Absence of Justice,
Disgaea 4: A Promise UnforgottenAtelier Rorona,
Atelier Totori,
Atelier MururuDemon's SoulsTrinity UniverseCross EdgeHyperdimension Neptunia,
Hyperdimension Neptunia: MK-2Ar tonelico (3): Qoga: The Knell of Ar-CielValkyria ChroniclesTales of Graces: F...off of the top of my head/I'm sure there's some I forgot (not in front of my games right now).
*PS*: Of course, there's all of the "PS1 Classics" you can buy/play on your PS3 (or PSP, for that matter)...
Also (although they're 'down-loadable-only' titles) - there's also:
Wizardry: Labyrinth of Lost Souls,
Vandal Hearts: Flames of Judgement,
(-and, while not an RPG...I believe that
Journey (and other "
That Game Company" games for sale on PSN may also be exclusive to the PS3.
There's probably
A LOT more titles only available from PSN that I'm unaware of (since I'm
*almost* strictly a "Physical"/"Being able to see, touch, feel, sell, etc" 'kind-of-guy')...so it would probably be a good idea for you to check-out some of the "PSN-Only" games, too.