It's possible. Is it also legal/acceptable?
Note that if you mod the core files, as soon as Steam validates the files you'll loose your changes.
A patch for the demo? Isn't that unusual?What do you think will be coming in the next day or two?
What do you think will be coming in the next day or two?
Sorry for posting the topic in General Discussion
The thing is, you might do things to extend the amount of content in the demo and I can't really see 2k/Firaxis be very happy about that. But it might also be one reason why they didn't release the demo before the game.
Steam doesn't validate automatically without a patch, at least it never did for ETW/NTW.