This is part of the reason why I don't play games anymore. Though I bought Starcraft II without realizing it had the same sort of security. I wasn't able to play my single player game at times because the servers were down (this was two years after it was released).
I wasn't aware of Gog.com... SimCity 2000? Special Edition for download $5.99 - GOG.com
Reticulating splines... I might just have to get this.