StarCraft was the best selling PC game of year 1998, which grew in its popularity primarily because of the new benchmark that the game had set with respect to real-time strategy games. The game is set in 26th century on the grounds of a remote place in Milky Way galaxy. Three enormous species fighting for supremacy in this distant part, forms the main storyline of StarCraft. The species are: The Protoss which is a race of humanoid religious warriors, The Zerg which form the insectoids race and The Terrans which consists of humans exiled from Earth due to over population.

These races will fight against each other to kill and survive on the illusory space opera settings of 26th century. Each race is balanced with their set of traits and specific abilities to harm one another. The whole game is divided into three parts, each part allowing the player to command one of the three races. In the first part, the player becomes Confederate Magistrate of Mar Sara which is threatened by both the races - Protoss and Zerg. In the second part of the game, the player takes up the role of commander within the Zerg race. And in the third part the player is a newly appointed officer in the Protoss military. Jim Raynor, an ethical and responsible law enforcement officer from Mar Sera, is an integral part of the game who accompanies the player on most of his missions.