12. Star Wars: Knights of the Old Republic (PC, also on X-box)
It seems fitting I place this here when Star Wars: The Old Republic is officially released today.
Bioware make great RPGs. Mix Bioware and Star Wars and you get the greatest Star Wars game ever created (although The Old Republic may dethrone it). The game was pretty much an entire Star Wars trilogy wrapped into a single game and even with its own lil' "I am your Father" shock moment. The story was superb, the characters were deep and interesting but still quintessentially Star Wars. The relationship between you and the other characters was still player influenced as with older WRPGs, but were given a new level of polish due to the focus on story and the new graphical hardware available.
Being set 5000 years before the original Star Wars trilogy helped by giving the game greater freedom in comparison to other Star Wars games; not trapped by the original storyline but still balanced within the greatness of the Star Wars universe with lightsabers, force powers and space fights. The sequel didn't make my list this year but is also a great game if unfortunately a little rushed.