We're aware of this problem and we wanted to let you know why this is and when can you expect some improvements. There are two ways Steam lets developers update their games, one is redownloading every changed file and the other one is incremental. It's important toknow the file structure of WW3 at this time, so let's take a look: We've got a few larger files in our content, mostly divided into maps, items, data and so on, in categories. This is done for speed of development during the time