Gran Turismo 5's Massive Optional Install
You want the best possible Gran Turismo 5 experience? It's going to be a 10GB install.
Andriasang reports that Polyphony Digital boss Kazunori Yamauchi was asked via Twitter about the game's HDD installs. While the smoothest play experience requires a massive 10GB of install space, it's worth knowing that the game will run with the much smaller 256MB option.
However, Andriasang said that it's not yet clear what Yamauchi means by "smooth" it will probably just help with load times and getting some of those high-quality textures looking their best.