There have been several reports of invalid CD keys on the EA Forums for the PC version of Bulletstorm. The serial key, while valid for installation via the disc, is shown to not be valid for redemption with the EA Download Manager (EADM) for installation via download.
Bulletstorm was released earlier in the week and the first DLC for the first person shooter has been announced. The combo shooting action is fun and addictive for sure, and to make sure you don't run out of maps to play People Can Fly are going to be releasing the DLC this Spring.
Bulletstorm has been out for roughly a day now, and like many you are probably starting to get your feet wet in the numerous Echoes challenges the game offers. The mode which lets you compete with the online network for the top points and bragging rights amongst your freinds, has a method behind it's madness.
One thing you'll notice when you fire up Bulletstorm's single player experience is the lack of more traditional online game modes. Cliff Bleszinski explains why a less traditional approach was taken with Bulletstorm, and the game is better because of it.