Gamasutra - Natural Universes And Deus Ex- Invisible War.
This design ingenuity remains as fabulous today as it did six years ago. Returning to it now, however, feels strange. It's not the inexcusably small size of the levels, I'm sure of it. I was fine with that back in the day, so why wouldn't I be now? And it's not the slightly suspect voice acting, either. Deus Ex's was terrible, and I can still lose myself for days in that original title. Indeed, my problem with Invisible War now seems to be something less tangible. It seems to lack a certain spirit, the sort of charisma that overflows from every inch of the first, milestone release.

It pains me to say it, but there's just no atmosphere in Invisible War.