In Neuromancer , Snow Crash , Johnny Mnemonic , Hackers , and just about every other chilling pseudo-cyberpunk vision of the future, there are two worlds. One is physical, where Real Death is possible, and where you choke on the pollution of New Tokyo-Beijing or whatever. The other world is virtual. You play an avatar in that world, or perhaps just a disembodied viewpoint, or you get polygonal hands to wave out in front of you, but there is only one virtual reality. If you’re on the network, you’re on The Network.
Offline: avatars and alts