Source:
http://www.bhd.jolt.co.uk
"The SP Demo
Hi there!
As you know, a version of the BHD SP demo is available on various cover mount CD's around Europe. This version was created for the CD's so that they could hit news-stands before launch.
The reason we did not release this version online is because we took it back in house and as we continued tweaking the full game, any and all tweaks made could then be put into the SP Demo.
The SP Demo in its fullest version will be released shortly, and should also include the updated MP demo that was released in test form before Xmas.
Marcus"
thanks to Joriz for the heads-up