Hello all, I do hope it is not a sin to say Mod in a Game Development Forum but I coudn't find another one that would cover this. I would like to do a pretty big overhaul to a game. I am IT and I do some web development, I am starting my Master's for Software Engineering next month, I have changed some game files for my own unique taste but never on a grand scale, like changing the way a map looks, unit design, etc... So I have some basic understanding of programming and mostly focused in web development and sql. I know the devs offer Mod Tools but I can not see how someone does a huge overhaul of a game on what they give you. I am wanting to basically make a new game but use the same setup as a particular one. What other tools, perferably free but do not have to be, is out there that would allow me to take on such a task? If it helps I am wanting to create a mod for Medieval Totalwar II. However, if successful and I enjoy it, I would like tools that allow me to work with other games as well. Thanks in advance.