Deus Ex might be set a few decades from now, but its backstory is one of conspiracies and power politics that go back hundreds of years. The Illuminati play a major role in this background as a mighty organization with power that supersedes that of nations themselves, including the US government.
Set in a near future where human augmentation through cybernetics is a common sight, Deus Ex titles have you fulfilling roles ranging from ex-SWAT security managers working for corporations to rookie anti-terrorist agents of the United Nations Anti-Terrorist Coalition.
Deus Ex's plots are blacklights for any conspiracy theorist enthusiast that will take you through twisted storylines and plot twists in a Blade Runner-esque universe where actors like the Illuminati, governments, international organizations, and multinational corporations are in a fight for survival with each another.
Avoiding spoilers as much as possible in case any reader might just want to pick it up for the first time, we can tell you that the chronological storyline order of the games is not the same as their release dates. The latest titles of the series, Deus Ex: Human Revolution and Deus Ex: Mankind Divided were published in 2011 and 2016 respectively, and both take place before the events of the original Deus Ex itself. So if the outdated graphics of the original seem too off-putting, perhaps the enticement of continuing the story after the latest games will convince you to try it out anyways.