Ah, I thought you meant the new one that got a metascore of like, 50.
Wait a minute. I just just checked and am wrong... wtf game was I thinking of...
EDIT for the 2nd time! I was thinking of Deus Ex: The Fall
Oh my GOD, Deus Ex: The Fall was the first Deus Ex you learned of? That is a colossal injustice.
Criminal.Let me tell you about the series. In the beginning there was Deus Ex, a game that captured the hearts and minds of all those who saw its splendor (and could look past the admittedly terrible graphics). Then a sequel called Deus Ex: Invisible War came out, and the disciples of JC Denton proclaimed it as a work of utter heresy, as its changes to the formula resulted only in a game that could not live up to the original. The third game in the series, Deus Ex: Human Revolution, was a prequel that, due to its massive budget and modern sensibilities, came out as almost a complete reinterpretation. All the technology was made to look futuristic by the standards of 2011, which a substantial change from the gloomy dystopia of the original. In spite of some design decisions that many people agree were total missteps (mandatory, single-solution boss fights! Press X to Be Awesome combat!) Human Revolution was well-received across the board and generally regarded as a Proper Deus Ex game.
In one respect, Invisible War is sort of the black sheep in the series, but The Fall isn't even worthy of that title. Invisible War is a good game in its own right, but didn't break away from the shadow of its Big Brother. Human Revolution was released at a time where it could gain a whole new audience with its triple-A appeal, but the dark side of this is that a lazily developed mobile game tie-in was pushed out the door some time later, with a half-assed PC port no one asked for not far behind. It was met with mild curiosity prior to its release, and with total disregard after. I had honestly forgotten that it existed, and I think that every Deus Ex fan will agree that you should never speak of it again.