Depends on what kind of RPG you like. If you like western RPGs, ie excessive dialogue that takes days to finish reading, little action, many choices, sandbox-style, etc, then The Quest is for you.
If you're like me and like J/C/KRPGs, with less dialogue, better graphics, better music, and linear gameplay, then there are a few:
Chronicles of Inotia: good graphics and music; however everything else is bad, it is extremely repetitive, dialogue depth is extremely shallow and the gameplay is too simple
Arvale: graphics aren't that great but the dialogue is much better than Inotia; it is also turn based, which I prefer
Vay: horrible graphics, but I heard it's better than Arvale; also you can fight more than one enemy at a time (unlike Arvale), it is also turn based
Zenonia: this one is not out yet, but it will most likely excel in the RPG genre; it is one of the most anticipated games