I still replay The Phantom Menace game, one of my favourites. Ironically, it had the graphics quite weak even by the standards of those years, yet one can recognize, that the developers put a lot into this little game. I mean, the levels on Naboo feel just the way Naboo should feel, as if you come to Venice or some European old city with beautiful architecture. The graphics limit the true potential of art of course, but yet passing through the streets, engaging battle droids, droidekas and AAT was much fun. And you can meet and talk to some citizens occasionally.
Not to mention the Mos Espa mission. They've included so many characters, different thugs, tusken raiders and monsters there. A lot of various aliens, like jawas, twileks, ishi tib, ithorians, grans, rodians, including some species I can't remember the names, but they appear in the Original Trilogy, in Episode VI for instance. The levels are also pretty detailed, as you can see apartments of the citizens, different yards and walkways.
At one point I found out, that the game had quite a lot of fans, and there was even a community on lucasforums, I think. One of the developers was also in touch with the fans, discussing different aspects of the game, like the characters cut away from the game, or the possibility of including Mace Windu into the missions. He even showed some never-before-seen material, well, a few pics, I think.
The game also had a lot of hidden stuff both in the gameplay and in the games files, which are of interest to SW fans.