Kotaku - I ran a test yesterday. I loaded the always-online SimCity—the game that EA says just can't be easily made to run offline—and then pulled the proverbial cord.
I switched off my Internet to see how long I could keep on playing.
It didn't last long, but what I discovered intrigued me.
Prior to the official release of SimCity, I'd already seen that the game could run offline if a signal dropped. I play the game on a laptop (a powerful one!) and my WiFi signal at home isn't always so hot. So, when I was playing on a press server a few days before release, I'd get a pop-up indicator telling me the network connection was lost. I could keep merrily building my city, and, when the connection came back, there were no hitches.