With the PlayStation Network version of Warhawk, Sony has added a few amendments to its PSN download policies. While PlayStation 3 owners used to be able to purchase a PSN title and download it to four other PS3 units - essentially sharing the game with other PS3 owners - Warhawk's DRM will make the game tied to the original purchaser's PSN account.

GameSpot recently spoke to a Sony representative to get more info on the new DRM policy. According to the Sony rep, the game can still be downloaded to other PS3 units, but it will only be playable under the original purchaser's account. The rep also noted that those who use the original account on a different machine "could not play on a different machine for 24 hours."

Future PSN titles will also be evaluated in terms of development costs, maintenance costs, server costs and other factors. These will be used to determine which DRM policy will be implemented for a particular game. The development costs for Warhawk, for example, is "no different than any other boxed game you might find from SCEA at retail". That along with its free online gameplay environment were the major causes for the implementation of the new DRM.