Need some models? Idea behind Us vs them is interesting, remember reading a plotline for an anime movie. Humans were made by some aliens as a bioweapon. Forgot the name of the movie, darn. Dark Colony was a so so rts. I had played the demo and was happy with it. Bought the game. When I had to redo my os, had to reinstall and start over. Some of the missions are too tedious to play over again. Humans had terraformed Mars and made into a place with a breathable atmosphere. The aliens returned and were not too thrilled with that. Aliens had living creatures while the humans had machines. One feature that the game had that was different was the commander. The commander could inspire the troops around him to fight harder or call for reinforcements. Basically both sides had the same type of units, except that the aliens had living creatures that could heal themselves. Do a search in google for "Dark Colony".