With their highly advanced technology and potent psionic abilities, the Protoss once considered themselves the most powerful species in the galaxy. Their war with the Zerg has proved otherwise: even the most individually capable warrior cannot overcome such insurmountable numbers. The lesson has been a hard one for the Protoss, for their society is built around core philosophies that have been rigidly adhered to for over a thousand years. However, the Zerg invasion of the Protoss homeworld of Aiur has brought the race to a crossroads: the Protoss must embrace change if they are to survive and prevail. Now new tactics and technologies are being brought to bear in the increasingly desperate battle against the Zerg, and ancient, terrible weapons the Protoss set aside long ago are being unleashed.

**All of our unit/building number statistics are subject to balancing changes.

Forced to adapt to the harsh existence on the mostly lifeless worlds of the sector, the Terrans are masters of survival. With neither the advanced technology of the Protoss nor the natural prowess of the Zerg to rely on, the Terran military forces consist of a varied mix of units. From basic but effective infantry like the marines to heavily armed battlecruisers, Terran units rely on solid armor, plentiful firepower, and strength in numbers to hold the line. Terrans excel in defensive situations where their bunkers and siege tanks really shine.

**All of our unit/building number statistics are subject to balancing changes.

The zerg are a race entirely unlike the Terrans or the Protoss. They are composed of many different species integrated into the Swarm via Zerg infestation. These creatures are rapidly and selectively evolved into deadly and efficient killers to further the driving Zerg imperative of achieving absolute domination. The Zerg make no use of technology to create their weapons, armor, or starships. Instead, these functions are efficiently fulfilled through biological adaptation and planned mutation of the Zerg strains. Even Zerg buildings are in fact specialized organs within the living, growing organism of a Zerg nest.

**All of our unit/building number statistics are subject to balancing changes.

Karune, Blizzard's RTS Community Manager, has responded to forum requests for Q&A sessions regarding Starcraft 2 units, buildings, gameplay, and lore. He has answered questions from a variety of sources in a total of 46 batches of answers.