The NVIDIA Shield was an interesting piece of hardware. While it was pretty nifty that it was the first device to tout the Tegra 4 processor, but at the initial price, nobody really needed and very few wanted a dedicated mobile Android Gaming platform. NVIDIA has been trying to push sales a bit lately as they dropped the price to $249 a while back and now it is at $199. While that may still not be enough to sway you, perhaps the fact that Portal is coming for the Shield just might.
This price includes the SHIELD along with a USB cable and AC power adapter. Users will also get Sonic 4 Episode II THD and Expendable: Rearmed for free. Of course, those are just two of the many available games. Aside from the recent mention of Portal coming soon, SHIELD users have recently gotten Rochard and R-TYPE II.