Winter!: Prepare for holiday gaming!
The best of the 3 Earth games (2140,2150), you start with choosing between ED (Eurasian Dynasty) and LC (Lunar Corporation), both with a total different look in build structures and units. After you finish this campaigns you unlock the UCS (United Civilized States) and the Aliens campaigns.
The missions are pretty like Command and Conquer, giving you new objectives while you achieve the one asked.
It's a good change of look because it's all passed in Mars and gives that space/alien atmosphere, nice cutscenes in middle of missions. a very good production of Reality Pump.
Game Traits applied to Earth 2160 (PC) by Maggie