The latest patch for Housemarque’s Dead Nation is live, however updating your game may cause more problems than it solves.
According to the developer’s Facebook page, updating now is not something that you want to be doing.
“We are investigating a possible save game problem which occurs after patch v1.06 which was released last night. We have received reports that in some cases the patch resets the campaign progress. In the meantime please do not update if you are worried about losing your campaign progress.”