Yesterday, the pirated release, Silent Hunter 5 Battle of the Atlantic-SKIDROW, was made widely available, circumventing the DRM easily with a patched executable.
Ubisoft, however, is saying the pirated game is not fully complete.
"You have probably seen rumours on the web that Assassin's Creed II and Silent Hunter 5 have been cracked. Please know that this rumour is false and while a pirated version may seem to be complete at start up, any gamer who downloads and plays a cracked version will find that their version is not complete," said the company in a note.
Ubisoft just seems to be denial, as most downloaders are happy to post they are playing and enjoying the complete game, offline, and DRM-free.