This story takes place in 2027, 25 years before the first game in the series, before nano-augmentation is available, in the age of mechanical augmentations (think hydraulics and dermal plating instead of nanites in your bloodstream). Your character is Adam Jensen, head of security for augmentation designer Sarif Industries. In the opening scenes, Sarif industries is attacked by a team of supersoldiers. Adam is severely injured in the attack, losing several limbs. The only way to save his life is through augmentation. Six months later, while he’s still recovering, Sarif calls him back into duty.
The year is 2050. The world is in a state of chaos. The Gray Death plague runs rampant, ripping through the populace. There is a vaccine, but it is in very short supply and is primarily used for the rich and famous. Riots occur everywhere, and anti-government groups are becoming more and more prominent. To combat this, the United Nations has formed a worldwide police force called UNATCO, the United Nations Anti-Terrorist Coalition.