He and his mismatched team of Scottish commandos, Uplifted Animals, and one of the most powerful psychics ever recorded, are sent down to the aquatic colony world of Proteus to investigate a destroyed psychic lab, violent cannibalistic cyborgs, and a dangerous conspiracy involving illicit technology and corporate experimentation.

An international incident between two rival human powers threatens to spark a war, and XCOM is sending in one of their best agents to investigate the cause: Major Adam Shepard, a Sentinel special agent who is part of the XCOM Psionic Corps. By 2183, humanity has allied with both the Citadel Council and the Geth Consensus to prepare to fight their mutual enemy. Things steadily get more and more complicated from there: the geth's actions reveal an even more terrifying threat in the form of the Ethereals, who prove to be far more of a threat than mankind ever imagined, and this is before the human race encounters the larger galactic society known as the Citadel. But in exploring the galaxy, they suddenly find themselves under attack by a strange species of artificial intelligences that call themselves the 'geth'. As they reach out into the stars, the human race discovers an ancient alien artifact left behind by a species known as the 'Protheans' - a mass relay that allows transition among the stars.

Along the way, the alien technology has altered humans and their perception of the self, resulting in a society where functional immortality exists via brain-uploading and body swapping, and mechanical and genetic augmentation is commonplace. Humanity survived the war with the Ethereals and spread into the stars, with the XCOM organization spearheading human advancement. Vigil is a Massive Multiplayer Crossover/ Fusion Fic built around the Mass Effect franchise coupled with the continuity of XCOM: Enemy Unknown, as well as significant elements of other settings such as Eclipse Phase, FEAR, Sid Meiers Alpha Centauri, and Destiny.

Mass effect contact war