GMDX is an award-winning large-scale modification for the 2000 PC classic Deus Ex. GMDX addresses the many flaws of the game, polishes it to a very high standard, and adds new layers of depth that one would have hoped to see in a sequel. GMDX is executed with the strict parameter of staying true to the original design principles that define Deus Ex, and seeks to improve all aspects of design excluding the plot and soundtrack. The cumulative result thus far is said to be, and aims to be the "definitive Deus Ex experience".
As I bought the GotY edition on steam yesterday I stumbled upon an article of PC Gamer 'How to run Deus Ex on Windows 7/8' where GMDX was recommended. I have played the game many times since 2001 having still the original cd version. Since then my gaming setup changed significantly from a 22" CRT monitor to a 28" LCD with 1920x1200 resolution. The default settings of the original DX offer only 1600x1200 @ 32bit resolution. So I was looking in principle for a mod to render the game in a higher resolution. But I got so much more the game looks prettier in a subtle way respecting the original look while gameplay is more demanding and offering more of a challenge. All in all a perfect overhaul for one of my most beloved games.