O mais próximo que existe de uma explicação do mundo do primeiro jogo é A Bíblia de Continuidade Deus Ex .
The Deus Ex Bible contains background information about the Deus Ex universe and a lot of information about this (like the date of birth of Paul Denton or the situation of "mech-augs" in 2052).
The Deus Ex Bible is intended to summarize the universe details behind the Deus Ex universe with a few additions and modifications for the sake of maintaining consistency with the finished game and the current Deus Ex universe.
Although some things didn't appear in Deus Ex (many missions in Texas, moon base etc.) and shouldn't be considered canon, the Bible looks closely at the details and background behind the events that appeared in the finished game.