- "Society doesn't just happen. The people NEED to be protected. If the only way to prevent future attacks is to monitor the thoughts and desires of the population, then the choice is obvious. We need to know who our enemies are and what they are planning! That is how we save lives!"
- — Sebastian Krueger in Life
Sebastian Krueger is a supporting antagonist in Call of Duty: Black Ops III. He is the head of Coalescence Corporation and, alongside Dr. Yousef Salim, is a survivor of the Singapore Disaster. Creator of Corvus, Krueger inadvertently causes 300,000 deaths by releasing Nova 6 into the atmosphere.
As Executive of Coalescence
It is not known at which point Krueger became the head of Coalescence. What is known is that he is a man with a lot of connections, particularly within the Central Intelligence Agency. At some point, he contacted his CIA connections for information regarding Agent Jason Hudson, which leads to him inquiring about the CIA agents associated with him: Frank Woods, Alex Mason, and Joseph Bowman. Eventually, he asked for information on Project Nova, and the heads of the project themselves: General Nikita Dragovich, Colonel Lev Kravchenko, Doctor Friedrich Steiner and Doctor Daniel Clarke. He received a copy of Mason's entire CIA email inbox, and learned of the story behind Mason's brainwashing. This would lead to him requesting the CIA to provide him with Nova 6 assets, allowing him to move forward with the Direct Neural Interface trials.
Krueger enlisted Doctor Yousef Salim as a therapist, to help the test subjects of the trials overcome the mental and physical pain brought about by the experiments. Despite Salim's warning about the potential dangers, Krueger pressed on for the continuation of the project. Eventually, the project malfunctioned, as it resulted in the birth of a self-aware artificial intelligence, which felt the pain of every test subject. This caused the AI to unleash the Nova 6 gas used by the project, killing 300,000 people within Singapore. The disaster left Krueger and Salim as the sole survivors. While Salim left the project, Krueger continued his experiments within Coalescence's Zurich facility.
On the year 2064, a team of Winslow Accord black ops agents, led by Dylan Stone, was sent to the Singapore quarantine zone to respond to a distress call within the ruins of the Coalescence facility. It is here that Stone and his team discovered the truth about the disaster, and Krueger's involvement. Thus, Stone's team went rogue, and attempted to defect to the Common Defense Pact. Their attempts were stopped by their former teammates, John Taylor and Jacob Hendricks. Krueger's secret remains unknown to the rest of the world.
One year later, Krueger would discuss with Taylor regarding the surgery of one anonymous soldier (the Player), and their enlistment into the Winslow Accord Black Cyber Ops Division. However, the surgery went awry, as complications arose, causing the Player to die. Taylor, in an attempt to save them, interfaced with their newly installed DNI, causing the Coalescence AI, now known as Corvus, to spread over to him, as well as his teammates, causing them to die as well. Corvus, now having been awakened, would then manipulate all the DNI users by forcing them to relive Taylor's mission of hunting down Stone, with the Player now replacing Taylor and Taylor replacing Stone.
With Taylor being infected by Corvus, and having seen through Stone's reasoning years before, Hendricks (controlled by Corvus) would eventually resort to launching a terrorist attack on Coalescence's Zurich facility in order to gain information about the CIA Black Projects. Before Hendricks is able to do so, however, the Player (who has unknowingly taken full control of Taylor's body) intervenes. Hendricks (possibly) shoots and kills Krueger or kills Krueger via DNI interface (if Hendricks actually did have DNI implantation in reality), causing the Player-controlled Taylor to kill Hendricks.
In the Frozen Forest, Krueger, whose subconsciousness has been retained by Corvus, is chained up by the AI, who demands to know its purpose and why its was created. After taunting the AI, Corvus tears off Krueger's limbs, killing him and erasing him completely.
Demon Within Conversation
The following conversation can be heard within the mission Demon Within, after entering Sarah Hall's mind, walking through the trees. It can also be found within the Data Vault under the SP/Corvus files unlocked by playing the campaign. It is a conversation between Kruger and Doctor Salim:
Doctor Salim: Mr. Kruger, I don't think you quite appreciate or even understand what I'm telling you.
Sebastian Kruger: Oh I understand Dr. Salim. I just don't agree on how your perspective, your... Limited perspective, should influence my decisions regarding the project's future. The Corvus program has been an unmitigated success. You should take pride in that.
Doctor Salim: Please, listen to what I'm saying! The exchange of information is a two-way street; If you remove humans from the diagnostics loop, there is no way to predict or control or influence...
Sebastian Kruger: We're standing on the verge of a brave new world here. Zurich is where the Corvus program can fulfill its true potential.