Rogue Galaxy is a outstanding game with some innovative stuff
Story: Just like the others, the main character Jaster Rogue want to be a space pirate [just like Vaan Ratsbane from FF XII]. In a normal day a huge monster star to devasted his little town. In middle of the rampage, he is confused to be the Galaxy's Top Hunter: Desert Claw. As the game runs you will travel to many planets and meet hundreds of people. With surprises in Chapter 9 and 10
Gameplay: Action RPG, with button-pushing to hit and shoot. Its a good revolution now that the Age of Turn-Based RPG is running out. The game have more than 400 different weapons. a chart to learn abilities [just like Final Fantasy XII]. Two innovative things: as you hunt down monsters you gain points in the Hunter Ranks. If you don't hunt fast you will be deranked. Another great thing is The Factory. You can manufacture some itens in a very cool way: its not just put the right materials, you have to build the entire line of production.
Difficulty: The game's only problem. Began easy, become way too hard in Chapter 3, easy again, a little hard in chapters 12 and 13. If you manage to get the party's ultimate weapons the game become fearly easy [I got them in the last part of Chapter 8]
Music: FANTASTIC. Almost as good as a Final Fantasy. Dramatic, epic.