In the year 2004, Earth is suddenly overcome by "spores" launching from an alien mothership. Slowly blocking earth from the sun, in only a week it rains down biological death on the earth... killing most of humanity and larger life forms.
Since then, the few survivors of mankind have sought out each other, and by 2005, enough humanity has joined together to make a stand. Calling themselves the Council of Earth, and working secretly in hidden bases, they must research, recruit and train to the ultimate goal of shooting down UFOs, engaging aliens in combat and reclaiming the Earth from their oppressors and the mutated biology.
This game is VERY similar to the cult favorite, X-Com but with a post-apocalyptic War of the Worlds (or perhaps "V: The miniseries") feel to it. Much of the game takes place on the world map where you choose which missions to attend to, where to build new bases (and what type) and your overall sphere of influence. Additionally, you control Research & Development and current equipment for your squad.
On the 3D map of each "area" however, the game is real-time strategy that pauses to allow you to give orders to your forces. In fact, at the end of queued actions or whenever something 'signifigant' is noticed, the game stops allowing you to put together a strategy. Just as in X-Com, these areas are limited in size, and visibility. However objectives vary.. killing all enemies is not always the purpose of a mission. Soldier development is also fairly detailed. The skills your squad uses out in the field they will get better at (they gain experience individually). Additionally when they reach certain prerequisites in their base stats, they can train to get better at certain skills, including Soldier, Medic, Scientist and others.