This mod aims at improving every aspect of the incredible game that is Age of Empires 3 and its expansions. From new mechanics to new civilizations, cards, technologies, units, buildings, maps, soundtracks and game modes, the Improvement Mod focuses on replayability and gameplay smoothness and has been in the works since 2009, making it the perfect choice for players who want to get the most out of the game and then some, without changing it completely.
Improved campaign scenarios, such as "Hold the Fort!" seen here.
What exactly are you changing?
Changing everything around that has problems, fixing bugs, misplaced units or buildings, giving the correct units and civs to every scenario, making the scenarios compatible with other changes I made, like in this image, I had to modify the top trading route a bit, also added more realistic walls for that time period, and other stuff that can be improved.
But don't worry, the campaigns remain the same. In some cases the changes I made are not even obvious.
I was talking about the current project here.
If you want to know what the mod is all about read some more info.