StarCraft is a real-time strategy game officially released by blizzard in 1998. The game is set in a sci-fi story background and focuses on three hypothetical galactic races: Protoss (a race of pure spirit and pure energy), Zerg (a race of pure body and pure Biology) and Terran (in the original version, the exiled test object from the earth – criminals, and the ued in the expansion film is the human colonist of the earth).
As an important element of real-time strategy game, multiplayer combat function is included in the game by Blizzard and provides good support. StarCraft supports LAN connections based on IPX and UDP protocols. In order to facilitate players to fight against many people on the Internet, Blizzard has set up its own server, so that all star players (usually legal users with genuine copies) can fight against players all over the world for free.