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"That look in his eyes... Reminded me of a kid that went crazy last week. Just an engineer, but something in him snapped."
—Detective Nathan McNeill[1]

Sam Caldwell was an engineer on the Aegis VII Colony and a member of the Extraction Dig Team who slaughtered his colleagues while under the influence of Marker 3A.[2]


Little was known about Sam Caldwell's early life though he eventually joined the Concordance Extraction Corporation. At some point in his career with the C.E.C., Sam was assigned to the Aegis VII Colony where he met and began a relationship with Lexine Murdoch.


Sam was called upon to aid in the excavation of Marker 3A. When the team removed the Marker from its pedestal, it flashed brightly and emitted a powerful energy wave. This powerful emission disrupted some of the colony's equipment by deactivating life support systems, impairing communications and damaging one of the gravity tethers. Sam's crew[note 1] separated from the extraction team to repair the tether.[note 2] En route, they encountered several miners and engineers who were in a highly violent state of dementia. They were forced to kill several colonists like Zochenko.

As they descended into the Megavent, Sam began to see strange Unitology-related script appearing before him only to disappear. He also began to hear voices including that of Lexine.[note 3]

Upon reaching the desired level, Sterling separated from the crew to assist someone that they had heard. Sam and Egan continued toward Gravity Tether 16.[2] Egan showed signs of dementia, eventually attacking Sam which forced him to shoot his friend. Sam reached the tether on his own and managed to repair it through the use of an appropriated Stasis Module.

Shortly thereafter, he managed to contact Lexine via the colony's somewhat less impaired communications system. When he was informed that some of the colony's life support systems were inactive, Sam located and successfully reactivated them. Afterward, Sam made his way toward the lift by fighting through numerous attackers. Near the lift, Sam had a chilling revelation after taking a sole attacker down. He recognized the attacker as Sterling.

Sam Caldwell (Chapter 1) (2)

Sam and his victims.

He continued to fight his way through as he was desperate to reach Lexine. He moved toward the descending lift, only to see more deranged attackers. Before he could take any action, one of them shot him. Fatally injured, Sam saw them advance only to resolve into P-Sec officers.

Shortly after learning that he had been in a state of hallucination and had killed his entire team, Sam died from his injuries.


"That thing's gotta be man-made..."
—Sam after seeing Marker 3A[2]
"Why'd you do it, son? All these people never did anything to hurt you."
—Detective Nathan McNeill[2]
"Is this even real? ...No, they're not real!"
—Sam Caldwell[2]


  • Disconsidering Stefan from No Known Survivors, of all of the protagonists in the game series, Sam Caldwell was the only one who never came into an encounter with a real Necromorph.



  1. The Extraction Dig Team appears to have been made from two smaller crews: one crew consisting of Sam, Sterling and Egan, and the other consisting of Cooper, Banks and Bear. Cooper and Sterling appear to be crew leaders, respectively.
  2. Caldwell was notified of the life support problems by Lexine Murdoch after he repaired the gravity tether.
  3. It is unknown exactly when Sam Caldwell entered a state of heightened delusion; therefore, it is currently unknown how many of his "attackers" were really attacking him, or if they were even anything more than illusions.