The main protagonist is Adam Jensen: coming from a humble background in Detroit, he was employed as a pioneer with the native SWAT squad until he won't follow a questionable order and is turfed out. He is taken on at Sarif Industries, a local firm at the leading edge of augmentation technology. A fellow at the Business is Megan Reed, a researcher for Sarif and Adam's ex-girlfriend. His employer is company CEO David Sarif, who is instrumental in rescuing Adam after he had been left near-dead in the start of the game.
Set in the year 2027, Human Revolution focuses on ex-SWAT officer Adam Jensen, who is used as security officer for Sarif Industries, a company on the leading edge of innovative and controversial artificial organs dubbed 'augmentations'. An assault on Sarif Industries that apparently kills researcher and Adam's ex-girlfriend Megan Reed also leaves Adam critically hurt. To save him company CEO David Sarif subjects him to a comprehensive augmentation procedure: six months later, now recovered and owning advanced augmentations, Adam sets out to pursue his attackers and the dark organization behind them. The story explores themes of transhumanism, the growing ability of megacorporations, and their effect on social class. It also uses the series' recurring cyberpunk setting and conspiracy theory theme.
Deus Ex: Individual Revolution is an action role-playing game with integrated first-person shooter and stealth mechanics. Players take the role of Adam Jensen, a man equipped with mechanical cybernetic implants called augmentations. The game's environments, which range from open world hubs to more scripted environments, are explored in first-person, although actions such as hiding behind cover, conversing with non-playable characters , and a few attack animations change to a third-person view. In these environments, players may discover NPCs that will advance the main story quest and optional side quests: completing quests, along with other actions like combat with enemies, rewards Adam with experience points, which raise his experience degree. Also accessible are black market vendors which supply weapons and equipment for Credits, the in-game money.
Back in Detroit, Sarif admits to Adam that the Illuminati are behind the attacks. Adam infiltrates a Humanity Front rally and discovers Sandoval's location. Sandoval admits his involvement in the kidnapping and gives Adam the lead to find the researchers. Back in Sarif HQ, Adam meets Hugh Darrow, who is currently working to stave off global warming with the recently assembled Panchaea Facility at the Arctic. Adam, together with other augmented people, also begin experiencing painful glitches, with authorities urging them to get a biochip replacement. Pritchard finds the tracking beacon of one of the scientists, taking Adam back to Hengsha, where he and Malik are ambushed by Belltower. The beacon leads Adam to Tong Si Hung, who has only been implanted with the now-deceased scientist's arm. Under Tong's leadership, Adam manages to stow away in a stasis pod in the wake of a staged explosion, waking up a couple of days later in a secret Singapore base. He finds that the researchers, and learns that the biochip malfunctions were staged to disperse the result of their research: a new biochip to control augmented humans. Adam and the scientists point a distraction, allowing him to infiltrate the facility's secret bunker. Here he faces Namir one last time, then finds Megan. Confronted, Megan tells him that she had been kidnapped for her study; the genetic key to make all humans compatible with augmentations, which she discovered in Adam's DNA -and to help Darrow transparency the Illuminati's plans.
At multiple points inside the game, Adam partakes in discussions with NPCs linked to main and side quests. When talking, Adam is presented with three different dialog options that affect the outcome of conversations: picking the right option can help with completing objectives while selecting the wrong option shuts off that path and forces the player to find an alternative solution. A 'Social' augmentation enables better understanding of an NPC's saying and estimating their psychological profile, improving chances of selecting the ideal dialogue option.
There are an assortment of ways to approach the game's situations: players can use a violent approach and shoot their way through environments while using cover to hide from enemy fire. Alternately, Adam can take a stealthy approach, avoiding guards and security apparatus, again using pay to prevent enemy sight lines. Adam can move between cover components and around corners while staying hidden. The melee takedown system provides lethal and non-lethal choices, in addition to an assortment of deadly and non-lethal weapons. Adam can also move the bodies of enemies to hiding areas, preventing them from being viewed and raising an alarm.
Set your position as Adam Jensen, an ex-SWAT specialist who's been handpicked to oversee the defensive needs of one of America's most experimental biotechnology firms. Your job is to safeguard company secrets, but when a black ops team breaks in and kills the very scientists you're hired to protect, everything you thought you knew about your job changes.
In a post-credits scene, Megan meets with Bob Page, the main antagonist of Deus Ex, to discuss her employment 'the nanite virus chimera' and 'D project': before this, Page educates his cohort Morgan Everett to search the Hyron Project for salvageable technology for the 'Morpheus Initiative': these are the precursors to the production of this Denton clones, the fabricated nanotechnological 'Gray Death' virus and the 'Helios' artificial intelligence, key parts of the plot of Deus Ex.