

Cerberus agents performed experiments on human children purchased from Batarian slavers, enhancing their biotic abilities. The organization was also behind several other unethical experiments. They also create EDI using the rogue VI encountered on Earth's moon. It's even believed that Cerberus was behind the Thresher Maw attack on Akuze, of which Shepard was the sole survivor if the player picked that backstory. Cerberus is involved in experiments on both the Rachni and the Thorian. In Mass Effect 1 Cerberus plays a key role, though it's easy to miss. The Illusive Man had a Terra Firma leadership candidate killed to enable their own favored candidate to win - Claude Menneau, who asks Shepard for their support in Mass Effect 1. By 2182 they were responsible for the assassinations of the leaders of the United North American States, China, and the Turian Hierarchy. Explicitly pro-human groups weren't safe either.

This included killing the Pope to allow for his replacement with a pontiff whose beliefs about the rapture more closely aligned with Cerberus' apocalyptic vision of humanity's impending extinction.
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RELATED: Mass Effect Fan Reveals Incredible Miranda CosplayĬerberus carried out a campaign of assassinations and espionage, often killing public figures in order to allow more Cerberus-sympathetic successors to take their places. From then on he personally oversaw Cerberus operations as the Illusive Man. It claimed that one day aliens would attempt to wipe them out as well. In the wake of the war mercenary Jack Harper, who had served under Ashley Williams' grandfather when he became the first human to surrender to the Turians, published the Cerberus manifesto. The Rachni Wars had ended not only with the elimination of almost all of the Rachni, but with the Citadel weaponizing the Krogans and - after a rebellion - infecting them with the genophage. It was suddenly introduced to a galactic civilization happy to take the fate of non-Citadel races into its own hands. Even after the ceasefire, humanity had reason to be wary. The conflict lasted for three months and formed a strong foundation of anti-alien suspicion on Earth. The Turians attacked the humans, who retaliated. The Systems Alliance was activating the Charon Relay, an act which unbeknownst to humanity breached Citadel regulations after the Rachni Wars, beginning with a group of scientists activating a relay leading to Rachni space. After discovering the Mass Relay system and spreading out among the stars, humanity encountered the Turians in 2157 CE. Humanity's first contact with aliens in the Mass Effect timeline did not go well.
