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".
Yes, it should only make you transparent to radar systems, not the naked eye, but [insert technobabble or pseudo-science to justify the effect because otherwise cloak would just be that much more appealing].
Edit: and here's that pseudo-science: JC's vision is augmented, and thus is distorted by the effect too.