Marine:Marines are the first line of defense for many of the Terran colonies. Outfitted with Powered Combat Suits, Marines are afforded full life-support, NBC shielding, and in-field chemical delivery systems. The standard-issue C-14 "Impaler" Gauss Rifle provides even a single soldier with extreme firepower.
Firebat:Equipped with powerful, twin arm-mounted "Perdition" flame throwers, these fearless warriors serve as assault troopers for those close encounters. Fire Bat Power Suits are heavier, more durable, and much more heat resistant than Marine armor, and provide additional squad-level support.
Ghost:Ghosts epitomize the height of human evolution and physical conditioning. These brave men and women, born with incredible Psionic potential, are adopted by the Confederate Government and trained from infancy to benefit mankind. The Ghost's uniform combines the latest in personal stealth technology and a sophisticated sensor suite, which can be used to coordinate nuclear strikes from the front lines. The Ghost's C-10 Canister Rifle uses a variety of special munitions to disable or destroy enemy vehicles and personnel.
Medic:The Medics of the United Earth Directorate follow a time-honored tradition of selflessly marching into combat zones to aid their injured brethren. These fearless women, aided only by protective shielding, are highly skilled healers capable of restoring the health and vitality of wounded soldiers. Medics can even cure various Zerg infestations such as Parasite or Ensnare.
Zealot:The heart and soul of the Protoss military are the fierce Zealots who have sworn their lives to the defense of Aiur. Through the path of the Khala, they learn to hone their innate battle rage to a fine edge. The power suits worn by Zealots enhance and channel their already formidable Psionic abilities, allowing them to form a protective shield around themselves and project massive energy blades from their forearms. Even a handful of these dedicated warriors can easily control an entire colony of other, lesser species, as they are capable of tearing through armored structures and vehicles alike.
High Templar:The High Templar are seasoned, veteran warriors of the Protoss armies that have walked far down the path of Khala. Those who choose to accept the mantle of the High Templar set aside the frenzied rage of the Zealot, and instead use their highly potent Psionic abilities to bolster the warriors of Aiur. The sight of enemy forces being torn apart by a Psionic Storm or wasting their firepower on projected Hallucinations is proof enough of the battlefield superiority that the High Templar can give to the Protoss.
Dark Templar:Banished from Aiur for refusing to submit to the Khala, the Dark Templar have wandered throughout the far reaches of space for generations. These mighty warriors, drawing secret powers from the cold void of the cosmos, are able to bend light around themselves, which renders them virtually invisible. Armed with modified Psi-Blade technology, the Dark Templar relentlessly strive to protect their race and the ancient secrets of their tribes.
Zergling:The small, savage Zergling is one of the few breeds that a core species has been found for. It is so closely related to the dune-runners of Zz?gash that it is believed that the Zerg at some point encountered and "absorbed" the DNA structure of the dune-runners. Mutated by the Zerg to be more efficient killers, the voracious Zergling are capable of ripping a larger creature to shreds with their razor-edged forearms and sharp fangs.
Hydralisk:This species, first seen in security camera footage discovered on a dead Terran cargo vessel, is one of the fiercest and most dangerous of the Zerg strains. The upper carapace plates of the Hydralisk can open to expose hundreds of spines that are projected with such force that they can penetrate 2cm Neosteel. Fortunately, they move quite slowly on open terrain.
Lurker:One of the newer and deadlier Zerg Strains is the Lurker. These creatures serve as defensive warriors for the Hive Clusters and outlying Zerg colonies. Bred from the Hydralisk strain, Lurkers emit waves of supra-dense spines against their enemies. However, Lurkers must actually Burrow underground to release these subterranean attacks. Any warriors on the surface who are caught by these spines are instantly impaled. These spines themselves are capable of tearing into flesh, steel, and even reinforced armor plating. The only weakness of the Lurker is that it is virtually defenseless while above ground.
Defiler:This breed is very rarely encountered, and we can be thankful for that. Vaguely resembling a scorpion in appearance, Defilers are veritable cancer factories. They generate a number of virus-like biochemicals which are capable of overpowering even the most effective anti-toxins. Defilers also appear to feed on other Zerg for biomaterial to produce these chemicals, and are often found with Zergling escorts.