Command & Conquer series saved from GameSpy shutdown thanks to community effort
Command & Conquer series are once again playable online.
C&C: Online is free, but you will need to sign up for an account to be able to play these games online. Not everything is working at the moment - statistics, ranking and automatch are all out for the time being - but you will be able to host, join and play games, and chat with other players while you wait for your skills to be aggregated and compared against your rivals.
Here is a tutorial video showing how to set the system up: