Online mode is relatively fast, which leads to the technology can't keep up with when playing computer. Actually, the sense of substitution is not very strong. Single machine will slow down the pace of the game and drag it to the link of scientific research and development.

Moreover, in online mode, there is no animation that miracles are slowly built. No one will say anything famous when your technology is finished. There is no pop-up window to tell you what you have achieved (although you can see it in the lower right corner). In online mode, you will be urged by the button in the upper right corner.