The PSN version of Final Fight: Double Impact has a hidden ‘extra’. The Playstation version requires an always-on internet connection so the game can communicate with Capcom servers. This means only one copy can be played per account, this new DRM scheme has been implemented to combat what Capcom call ‘rampant game sharing.’
Capcom have made an official statement:
Capcom would like to formally apologize for the issues consumers are having with the PS3 version of Final Fight: Double Impact. Typically, the notification for a required PlayStation Network connection appears in the full game description when a game is downloaded from the PlayStation Store. Unfortunately when populating this content this detail was overlooked and wasn’t included in the versions of the game that released in North America and Asia. It was included in the release for Europe. Capcom should have checked to make sure the notification was included when the final game was made available and we sincerely apologize for this oversight.
The DRM requirements for Final Fight: Double Impact are not unique to this release. This protection mechanism has been implemented in numerous games offered on the PlayStation Store before. When it was brought to our attention that the notification was missing, we acted quickly with Sony Computer Entertainment America and a fix is on the Way.
Capcom have said this is not a policy change for future titles but a test to ‘evaluate the impact’ of this DRM scheme.