version 1.0 of the game was shipped with a number of bugs in it and although patch 1.1 addressed some of them (and removed the copy protection), a new patch was released with the release of the 'venice' add-on (originally version 2.0), updating the base game to 1.2. on november 25, 2010, a third patch was released to address (among other things) a serious save game bug, patching the base game to version 1.3 and the 'venice' expansion to version 2.1. the 'gold' version of the game that includes both the original game and the 'venice' expansion was also patched in november 2010 to version 3.1, which combines all the changes of the version 1.3 patch of the base game, and version 2.1 of 'venice'.