> The only differences would be: (1) You aren't there to complete missions; there's no storylines and it's totally open-ended. There are no writers, and (2) The spaces and content are created by anyone, not a central company, and (3) You can go from GTA world to Red Dead world to tons of other worlds without changing missions or skins or avatars or whatever; they're part of the same huge space you can traverse without leaving VR. (4) You can code your own physical spaces and code your own avatar's abilities.

So Second Life ...

http://wiki.secondlife.com/wiki/Content_Creation