NetRunner is a game based on the genre of Cyberpunk and Cyberspace. The object is to break into computers and steal as much money as you can. To do this, you have a cyberdeck, and various programs. But the systems you are attempting to break into also have programs (called ICE: Intrusion Counter Electronics) that will try to prevent you from breaking in. These programs can do anything from alerting a computer operator who will drop carrier on you, to trying to kill you.