Protoss and Zerg building construction is limited to specific locations: Protoss buildings need to be linked to a power grid,[20] while Zerg structures must be placed on a carpet of biomass (dubbed the "creep") produced by certain structures.[21] Terran buildings are far less limited, with certain primary base structures possessing the ability to take off and fly slowly to a new location.[19] Terran buildings, however, require the worker unit to continue construction on the building until it is completed. Also, once a Terran building has taken a certain amount of damage, it will continue to lose hit points until it burns to the ground, even if the enemy ceases fire or withdraws. The building can, however, be repaired by a worker unit. The Protoss, by contrast, only require a worker unit to begin the warp in of a building, and their buildings' shields (but not their structure) will automatically regenerate gradually to full strength; while the Zerg worker unit physically morphs into the structure created, which, once attacked, is capable of gradually healing itself back to full health Multiplayer on StarCraft is powered through Blizzard Entertainment's Battle.net Internet service. Through this, a maximum of eight players can compete in a variety of game modes, from simply destroying all other players on a level, to king of the hill and capture the flag objective-based games. In addition, the game incorporates a variety of specialized scenarios for different types of game, such as simulating a football game, using the Terran hoverbike unit to conduct a bike race, or hosting a Zerg hunting competition.[17] StarCraft is also one of the few games that include a spawn installation, which allows for limited multiplayer.starcraft keys,starcraft codes, It must be installed from a disc, and requires a product key to work just as the full version does. However, one product key can support up to eight spawned installations with access to Battle.net. Limitations of a spawned installation include the inability to play single-player missions, create multiplayer games or use the campaign editor. StarCraft takes place in a science fiction universe created by Chris Metzen and James Phinney for Blizzard Entertainment. According to the story presented in the game's manual, the overpopulation of Earth in the early 21st century has caused the international government to exile undesirable elements of the human race, such as criminals, the cybernetically enhanced and genetic mutants to colonize the far reaches of the galaxy.[23] In the distant Koprulu Sector of the galaxy, the exiles form several governments, but quickly fall into conflict with each other. One government, the Confederacy of Man, eventually emerges as the strongest faction, but its oppressive nature and brutal methods of suppressing dissidents stir up major rebel opposition in the form of a terrorist group called the Sons of Korhal. Just prior to the beginning of the game in December 2499, an alien race of advanced technology and psionic power, the Protoss, makes first contact with humanity by destroying a Confederate colony world without any prior warning. Soon after this, the Terrans discover that a second alien race,starcraft game card,cd key for starcraft, the insectoid Zerg, has been stealthily infesting the surface of several of the Terran colonies, starcraft key code,and that the Protoss are destroying the planets to prevent the Zerg from spreading. With the Confederacy threatened by two alien races and internal rebellion, it begins to crumble