What is the X in X-mas?
An upgraded version of the game/simulation SimCity by Maxis Software. In the new version you can raise, lower and level terrain; build roads and railways at 45-degree angles; name things in your city by planting "signs"; build raised highways, subways, and train and bus stations, schools, colleges, hospitals, electricity, water, recreational marinas and zoos.
There are three levels of zoom, and the view may be rotated to look at your city from any of the four directions. A query feature which will tell you the zoning, land value, etc. of any square. You get newspapers, advice from council members, graphs, and charts.