You're going to need a patch to get this game running smoothly on a modern OS. There are a few choices, but I've tried two. Kentie's launcher was slow and crashed on me, but Deus Ex community update worked flawlessly.

Surprise surprise. It's amazing. I recently played this and found the way the open-ended gameplay worked with the story to highlight the topic of personal choice and freedom especially cool. The game lets you ultimately decide what the value of agency is to you/this reality and damn it's cool.