Really, I don't need to do offline mode, plus:
No saving
No help from other player's mass transit,school buses, garbage trucks, recycling trucks, fire trucks, ampbulances, police cars (and all secondary things).
No global market
No schools from other cities
No chance for a great works
No chance for several specializations
No possibility for friends to play with you
No point in certain buildings (like the Vu Tower)
No tourists
No air pollution from others
No place for your residents to go to is they don't wanna shop in your town.
Seriously, the game was based around co-operationand inter-city play. Maybe the franchise isn't, but they can change it, can't they? If you don't want it, don't play it. I know you're probably pretty *** about the DRM, Xareh, but it's not that bad in this game (not that it's a good thing. It could be far, far worse).