Oh come on! Why are you even reading this? You already know what StarCraft is like, and probably just getting this because StarCraft 2 is on the Horizon. If you don't you'll certainly know after you play the demo. Do you really need a description? Fine.
There was once a man who downloaded this file. Full five all new missions he find. Missions he cannot be seen ever before. He was the bold Terrans, fights against tough Zerg. Multiplayer he find also. Is prequel to most bestselling StarCraft game. Exciting goodness download.