6. Dragon Quest: The Journey of the Cursed King, PS2/PS3.
Another Square Enix RPG that's still relevant this holiday season, Dragon Quest: The Journey of the Cursed King (or Dragon Quest VIII), is a proper Japanese RPG, and, while it might be a bit daunting for newcomers to the genre, is sure to have RGP fans crying tears of joy. From the mouth of Olly: "RPG fans who have yearned for this series to make it to our shores will struggle to find a better example this generation." Another class but cheap option for PS2/PS3+backwards compatibility owners.
This is hands down one of my favourite RPGs ever, and one of the best games on the PSP. While it's not for everyone, it's certainly for every RPG fan. It's got classic 90s graphics, turn-based combat played out on a grid, beautiful rendered cut-scenes and a gripping story. It's also really well suited to handheld gaming - each battle shouldn't take more than 20 minutes, which, if you have a half hour commute in the morning, leaves 10 for a bit of story and some character tweaking. Perfect, enthralling and essential.