Giants came out at the wrong time, to the wrong audience, with the wrong expectations. The few of us that actually saw the game for what it was, were thrilled. In a time of mindless FPS games and boring RPGs, Giants brought back what games started out trying to bring us... entertainment.
The world inside Giants is beautifully designed (for the time it was made), the characters are all unique and tie seamlessly with the plot. One underrated aspect of Giants was it's brilliant humor. I suppose the days of laughing hysterically at half naked sea reapers and overgrown giants are over.