I'd have to say Knights of the Old Republic 2. Read this [http://lparchive.org/Knights-of-the-Old-Republic-II/] LP for a more detailed explanation, but here's the simple version. A mature look at the Star Wars universe, which does not go the normal route of depicting the jedi as Jesus mixed with superman, but instead shows them as the reactionary, stubborn, dogmatic old men they would have to be. Add to that that they pulled off one of the only truly, 100% successful examples of a completely cryptic, wise old teacher character (with the twist that she lies ALL THE TIME), and you have an amazing game.