I know saying FFVII is a good game is equal to saying Hitler was a pretty awesome guy around here, but FFVII is the game I cherished the most, its story, while poorly explained, was masterfully written, with a fantastic combat system, and an immersive world.

Baldur's Gate II: Shadows of Amn blended gameplay and storyline masterfully, as one of the best-written games ever, and Bioware's crowning acheivement. (Which is saying a lot.)