Then you're not talking about what I was referring to, which is a regular D&D game.I specified pbp.
I've already covered the difference. Yes, in a computer game if you can't exit by the window because it's not programmed to let you, then you're stuck. A DM has the upper hand in this case, because he can improvise.If you are specifically choosing to do something in the game that the DM is not ready for it is the same as doing something in the computer game that was not programed.
In the case of detailing an entire world on the fly, though, the computer is the clear winner. A DM cannot compete, and neither can the PnP modules and game settings on offer - they simply lack the time and the page count to come anywhere near what a CRPG setting can offer in terms of sandbox freedom.
Remember, CRPGs invented the Overworld, and are busy refining it, whereas PnP is still busy "going back to the dungeon" because that's all too complicated for mere human DMs.