Several months ago, Maxis published a blog post claiming they were exploring the possibility of an Offline Mode.
Right now we have a team specifically focused on exploring the possibility of an offline mode. I can’t make any promises on when we will have more information, but we know this is something that many of our players have been asking for. While the server connectivity issues are behind us, we would like to give our players the ability to play even if they choose not to connect.
Today they announced the intended changes coming in the 8.1 patch. One of those was the long-awaited Offline Mode. After a year of updates, SimCity is finally starting to look like the game that should have shipped back in March.
Other upcoming changes include MegaTower RCI balancing bugs, performance issues and problems with the Maglev Stations.
MegaTower: Residents within a MegaTower will more efficiently find work rather than abandon the tower Maglev: Addressing the reports from players regarding Maglevs getting stuck within their city MegaTower: Commercial levels will no longer complain that they require shoppers whilst Residential levels request more shops Education: Investigating education enrollment levels dropping when using MegaTowers Performance: Investigating miscellaneous performance improvements on PC and Mac Offline: Exploring the option of Offline Mode – http://www.simcity.com/en_US/blog/article/state-of-simcity