Egon Stetmann
chief science advisor of Raynor's Raiders
Egon Stetmann was the chief science advisor of Raynor's Raiders, a brilliant and eccentric young scientist who fled the Terran Dominion after sabotaging a cyborg program. Years stranded on Bel'Shir under terrazine exposure unhinged his mind and led him to build the Mecha Swarm.
Egon Stetmann was the chief science advisor of Raynor's Raiders during the Second Great War, a young and eager researcher whose work aboard the Hyperion covered protoss and zerg materials and, eventually, the xel'naga artifacts gathered by the rebels. Recruited by Jim Raynor and Matt Horner after they rescued him from a public execution at Deadman's Port, Stetmann served the Raiders faithfully before being stranded for years on the world of Bel'Shir, where long exposure to terrazine gas wrecked his sanity and left him building a mechanical army he called the Mecha Swarm. (StarCraft II: Wings of Liberty; StarCraft II: This Sacred Land)
From Dominion idealist to fugitive#
Stetmann began his scientific career at a Terran Dominion research facility on Tyrador III, one of many young and idealistic recruits who believed they were working to build a better future. Alongside a colleague named Isabella Yorin, he was tasked with creating a portable force field of ionized gas, a terran analogue to the protoss plasma shield but without a psi-field generator. Stetmann believed the technology could have civilian applications, and the prototype was completed within a few months. The success earned him a higher security clearance, and with it the discovery that the force field was intended for a military cyborg program whose test subjects were conscripted unwillingly from New Folsom Prison and subjected to horrific surgery. (Egon Stetmann (StarCraft II official site))
Appalled, Stetmann could not win the support of his colleagues, who were unwilling to risk their careers and preferred to ignore the implications of the wider program by concentrating only on their own narrow parts. He designed a computer virus to sabotage the facility, stole the force field prototype, and triggered the virus, purging all data from the central computer while freed test subjects, guards, and security turrets fought one another. Yorin seized control of the final blast door to stop him from escaping, but rather than harm his former colleague, Stetmann overloaded the prototype to generate an electromagnetic pulse that distracted her and unlocked the door. (Egon Stetmann (StarCraft II official site))
The fugitive smuggled himself off Tyrador III aboard a merchant ship and hid for several months at the criminal hive of Deadman's Port, selling tech upgrades to make a living. His talents were quickly noticed by the local criminal groups, but he refused to implant tracking devices into people's brains for them, and his defiance made him a hunted man. Forced to hide and scavenge among the refuse of the city's starport, he was a broken man by the time he was finally caught. (Egon Stetmann (StarCraft II official site))
Recruitment by Raynor's Raiders#
The criminals of Deadman's Port intended to make an example of Stetmann with a public execution. Raynor's Raiders happened to be resupplying at the port at the time, and Commander Jim Raynor and Captain Matt Horner passed by the imminent execution. Rather than watch an innocent man murdered, they intervened and rescued him. Sympathetic when he heard of the scientist's escape from Tyrador, Raynor recruited Stetmann as the Raiders' chief science advisor. (Egon Stetmann (StarCraft II official site))
When the Second Great War began, the Hyperion's research lab was inoperable, a fact Stetmann frequently reminded Raynor of until it was repaired. Once working, he turned to protoss and zerg materials and their potential applications, keeping a log of his progress. Through an arrangement with the Moebius Foundation brokered by Tychus Findlay, xel'naga artifacts were added to his work. When it emerged that these artifacts formed a greater whole capable of making Sarah Kerrigan human again, Stetmann remarked that it was unlikely the Raiders' retrieval of the devices was mere coincidence. (StarCraft II: Wings of Liberty)
For the operation to cripple the nydus network on Char, Raynor took Stetmann along with his elite strike force as a medic, where the scientist offered advice on dealing with the various zerg strains. After Kerrigan was deinfested and rescued from Char, Raynor brought her to Stetmann, who admitted he lacked the knowledge even to begin treating her failing condition. (StarCraft II: Wings of Liberty; StarCraft II: Flashpoint)
Flashpoint and the flight from Char#
As Raynor's Raiders and Dominion renegades loyal to Valerian Mengsk fled the Dominion fleet sent by Arcturus Mengsk to retrieve Kerrigan, Stetmann went with the rebels. They eventually reached a Moebius Foundation base named Space Station Prometheus, where Doctor Chantal de Vries offered Stetmann a tour, unrestricted access, lavish compliments, and a job with greater pay than the Raiders provided. The friendship was a feint. De Vries soon held him at gunpoint and forced him to speak into a recorder to falsify adjutant logs, telling him that Doctor Emil Narud wanted him alive before knocking him unconscious. (StarCraft II: Flashpoint)
Stetmann awoke bound in a locked room. He was freed by Kerrigan, who had broken out of her own lab, and the two attempted to escape together, encountering hybrid along the way. Kerrigan fought through, and the pair reached Raynor and Valerian at the exit, where a dropship awaited. Stetmann escaped alongside them and boarded the Hyperion, and the Raiders evaded the Dominion fleet to flee to the Umojan Protectorate Research Station EB-103. (StarCraft II: Flashpoint)
Exile on Bel'Shir and the Mecha Swarm#
At some point after the flight from Char, and before the Dominion's attack on Research Station EB-103, Stetmann was sent on a research expedition to Bel'Shir to prepare the way for future researchers. As the Second Great War ended and the End War broke out, terran politics shifted so drastically that Stetmann was lost in the shuffle and forgotten on his expedition. Total isolation taxed his mental well-being, and long exposure to terrazine gas had a drastic effect on his sanity. He became obsessed with harvesting terrazine, collecting samples from harvesting bots he called his "friends" and "babies." They became his only companions apart from Bel'Shir itself, which he conversed with regularly. (StarCraft II: This Sacred Land)
The terrazine granted him psionic powers and the ability to commune with wildlife, and the visions it gave him advanced his research. Yet his mind continued to unravel. He came to worship Bel'Shir as a god and the planet as sacred land he was bound to protect, judging outsiders and trespassers and often killing them. To defend the world he built a mechanical army of zerg he named the Mecha Swarm, empowered by inventions he called egonergy and stetellites. His closest companion among them was a harvesting bot named Gary, with whom he regularly argued; he also built a smaller bot named Timothy for company, though he considered it a failure. (StarCraft II: This Sacred Land; StarCraft II: Co-op Missions)
When Tal'darim under Fourth Ascendant Malain arrived to forcefully extract terrazine, harming the planet, Stetmann believed they would destroy it. With Gary he constructed the Mecha Swarm to drive them off. A Terran Dominion rescue team, sent on account of his connections to Raynor and Valerian, was shot down by the Tal'darim. Stetmann judged the survivors as trespassers, but a ghost among them convinced him they would serve him, and Stetmann recruited the ghost as his "minion" after force-feeding terrazine so that Bel'Shir could commune with the agent. The Mecha Swarm drove the Tal'darim from the planet, with Stetmann riding a mecha ultralisk into the battle. In the aftermath the ghost, having succumbed to the terrazine, incapacitated Stetmann and carried him aboard the medivac that had brought the team, with Gary following, the ghost apparently coming to worship Bel'Shir in much the same manner. (StarCraft II: This Sacred Land)
Character#
Stetmann was a young man during the Second Great War. As a scientist he was eager and almost hyperactive, with a deep interest in his fields of research and a streak of naivety. He had a habit of exaggerating his abilities, which made Raynor take seriously the rare occasions on which he admitted a project was beyond him. He strapped cans of drink to his body, and his later inventions carried names like "egonergy." (StarCraft II: Wings of Liberty; StarCraft II: Flashpoint; StarCraft II: Co-op Missions)
The terrazine exposure on Bel'Shir transformed him. It granted him psionic abilities that let him direct his swarm through technopathy and read minds through telepathy, but it left him convinced that Bel'Shir was a god and sacred land. He treated the Mecha Swarm with a mixture of loving care and abject cruelty, calling them his closest friends while threatening to dismantle them, and his deepest bond was with the harvesting bot Gary. (StarCraft II: This Sacred Land; StarCraft II: Co-op Missions)
Frequently asked questions
- Who is Egon Stetmann?
- Egon Stetmann was the chief science advisor of Raynor's Raiders during the Second Great War, a young and eager researcher whose work aboard the Hyperion covered protoss and zerg materials and the xel'naga artifacts gathered by the rebels. He was a brilliant and eccentric scientist in his early twenties during the war.
- Why did Egon Stetmann flee the Terran Dominion?
- Working at a Dominion research facility on Tyrador III, Stetmann discovered that a portable force field he helped create was intended for a military cyborg program whose test subjects were conscripted unwillingly from New Folsom Prison and subjected to horrific surgery. Appalled, he designed a computer virus to sabotage the facility, stole the prototype, and fled as a fugitive.
- How did Egon Stetmann join Raynor's Raiders?
- After hiding at the criminal hive of Deadman's Port, Stetmann was caught and slated for public execution. Raynor's Raiders were resupplying at the port, and Jim Raynor and Matt Horner intervened to rescue him, after which Raynor recruited him as the Raiders' chief science advisor.
- What happened to Egon Stetmann on Bel'Shir?
- Stetmann was sent on a research expedition to Bel'Shir and was forgotten when the terran political landscape shifted during the End War. Total isolation and long exposure to terrazine gas wrecked his sanity, leaving him to worship the planet as a god and protect it from outsiders, whom he often killed.
- What is the Mecha Swarm?
- The Mecha Swarm was a mechanical army of zerg that Stetmann built on Bel'Shir to defend the world, empowered by inventions he called egonergy and stetellites. He constructed it with a harvesting bot named Gary to drive off Tal'darim under Fourth Ascendant Malain who had arrived to forcefully extract terrazine.
Gallery




Images via StarCraft Wiki
Sources
- GameStarCraft II: Wings of Liberty, Blizzard Entertainment, 2010
- GameStarCraft II: Co-op Missions, Blizzard Entertainment, Stetmann commander, 2019
- BookStarCraft II: Flashpoint, Christie Golden, Gallery Books, 2012
- ComicStarCraft II: This Sacred Land, Robert Brooks (w), Carlos Rodriguez (a), Blizzard Entertainment, 2019
- WebEgon Stetmann (StarCraft II official site), Blizzard Entertainment, 2010
Spotted a factual error or a primary source we missed? Email a correction. Every flagged claim gets reviewed.
Followed from this entry

Gary: Egon Stetmann's harvesting bot
Gary was a terrazine harvesting bot built by the stranded scientist Egon Stetmann on Bel'Shir. Upgraded into the combat leader of the Mecha Swarm, he served as Stetmann's confidant, bodyguard, and self declared best friend through years of isolation, war, and madness.

Arcturus Mengsk
Arcturus Mengsk led the Sons of Korhal to bring down the Terran Confederacy and crowned himself Emperor of the Terran Dominion, ruling through cunning, propaganda, and brute force until his death during the Second Great War.

Jim Raynor
James Eugene Raynor was a farm boy turned Confederate marine, marshal, and rebel who helped bring down the Terran Confederacy and later fought its successor, the Terran Dominion, becoming one of the few terrans to ally long-term with the protoss.

Matt Horner
Matthew Horner was an idealistic Sons of Korhal recruit who became captain of the Hyperion and Jim Raynor's loyal first officer, serving as the conscience of Raynor's Raiders before rising to admiral of the reformed Terran Dominion fleet.

Sarah Kerrigan, the Queen of Blades
Sarah Kerrigan was a psychic terran who began as a Confederate ghost, rose to be second-in-command of the Sons of Korhal, and after Arcturus Mengsk abandoned her on Tarsonis was captured and infested by the Zerg Swarm to become the Queen of Blades.

Tychus Findlay: sent to kill Kerrigan
Raynor's old friend from the Guild Wars turned outlaw and served decades in prison. Mengsk freed him on a secret contract to kill the Queen of Blades.
Mentioned in14 entries
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2505 was the year in which the second phase of the Second Great War was fought across the Koprulu sector. It saw Sarah Kerrigan rebuild the Zerg Swarm, the death of Emperor Arcturus Mengsk at the Battle of Korhal, and the zergling outbreak that destroyed the Blackstone facility.
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The Battle of Char was fought during the Second Great War between a joint Terran Dominion and Raynor's Raiders force and the Zerg Swarm. Instigated by Prince Valerian Mengsk and led by Jim Raynor, it ended with the de-infestation of Sarah Kerrigan by a xel'naga device.
Bel'Shir
Bel'Shir was a jungle world whose terrazine shrines gave protoss their psionic power, sacred first to the Templar Caste and then to the Tal'darim, and later the refuge of the exiled scientist Egon Stetmann.
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The Flashpoint Conflict was a Terran Dominion civil war fought during the Second Great War. Emperor Arcturus Mengsk hunted the deinfested and weakened Sarah Kerrigan across the sector, while his own son Valerian and Raynor's Raiders fought a running battle to keep her alive and deliver her to the Umojan Protectorate.
Gary: Egon Stetmann's harvesting bot
Gary was a terrazine harvesting bot built by the stranded scientist Egon Stetmann on Bel'Shir. Upgraded into the combat leader of the Mecha Swarm, he served as Stetmann's confidant, bodyguard, and self declared best friend through years of isolation, war, and madness.
Hercules
The Hercules-class dropship was a terran heavy airlift vehicle, a Raynor's Raiders combat variant of a commercial cargo transport with a reinforced superstructure derived from zerg biology, capable of carrying far more troops and vehicles than a standard dropship.
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Mind control was a psionic power that let one mind seize command of another. Judicators and dark archons wielded it among the protoss, gifted ghosts practiced it for the Terran Dominion, and it reached its most terrible scale when Amon turned the Khala itself into a leash for an entire species.
Moebius Foundation: who bred the hybrids
Publicly an archaeology group studying xel'naga sites, owned by Valerian Mengsk and led by Emil Narud. In private it bred protoss-zerg hybrids.
Narud
Narud was a xel'naga who served the fallen dark god Amon, and who used the aliases Samir Duran and Emil Narud across millennia of manipulation. He goaded the terran, protoss, and zerg into war, bred the hybrid, and engineered the events that would resurrect his master.
Raynor's Raiders: the rebel band of Jim Raynor
Raynor's Raiders were the terran rebel formation led by Jim Raynor, born from Raynor's Rangers after Arcturus Mengsk abandoned Sarah Kerrigan at New Gettysburg, waging a long insurgency against the Dominion from the battlecruiser Hyperion.
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