Mantic Games are experiencing issues with their online payment processing and have extended their free shipping offer.
From their announcement:
An apology from Mantic Games,
Typically on the last day of our world wide free shipping promotion, our payment gateway provider has had some technical issues which has resulted in a error message and failure when checking out of the Mantic Web Site. We would like to apologise for an inconvenience this may have caused. It is unfortunately completely outside of our hands, although we are reassured everything is being done to correct the fault as quickly as possible.
Due to this unforeseen circumstance we at Mantic felt it only fair to give you an extra 24hrs of free shipping using the FREEDELWW code.
Once again sorry for any inconvenience caused