As with many such games, StarCraft came with a series of pre-set combat missions for gamers to play against the computer. These series typically start with introductory missions and become ever more challenging battles. These campaigns are set in a time and place in a fictional universe, and events in one battle lead to the next in the campaign. Unlike Blizzard Entertainment's first two Warcraft games, StarCraft campaigns aren't alternative histories that vary with which side the player chooses, but are sequential parts of a single larger timeline. Also, the background for StarCraft is far more detailed and complex than many other video games', including the personal stories of tragic and heroic main characters, and was created with the help of professional science fiction authors and arti