Ok first off I don't know who anyone can compare counter-strike to this
game, they are in no way similar except they are a FPSs.
Deus
Ex is quite possibly the best
game ever made. No
game is as innovative, well executed, well written, and plain old fun as this. This
game never gets old no matter how much you play it. You can play anyway you want and your actions will affect the outcome of the storyline in dramatic ways. If you explore the
game deeply it has a lot of cool hidden stuff. It gave birth to the whole good-
guy-bad-
guy meter a lot of games have today (Knights of the Old Republic, Fable, Elder Scrolls), but this
game pwns them all. The beginning of the
game drags a bit but if you get past the first 2 levels it picks up. The story line is deep and fun to follow also. What really makes this game shine is the nano-augumentation system on how you can upgrade your-self and really affect how you play. This game is not for everyone, if you want a pick up and play game you will hate this. If you
love deep, engrossing games with countless hours of replay, you will not be let down.
Though System Shock 2 had this concept and was around before Deus Ex(one year before I think), it was not executed well and had many flaws.