Gametap has added Dues Ex to their list of free games, which now stands at 125 titles. If you happened to miss it the first time around in 2001, then this is the perfect opportunity for you to check it out now.

The download comes in at a very slim 151MB and is rated M (for Mature) so it’s not one for the kids.

If you don’t know already, Deus Ex is a sci-fi shooter in which you play the role of anti-terrorist operative JC Denton. Set far in the future, the world is on the brink of total meltdown, and it’s your job to uncover the conspiracy behind the chaos and attempt to put a stop to it.

Graphically it’s obviously not going to compete with Call of Duty 4 or Halo 3, but what the hell, it’s totally free (and the story and setting are better than both those games combined). Plus, Deus Ex 3 is on the way!

Skepticism aside, both Bioshock and Fallout 3 are paving the way for old, fallen PC gaming series to experience a renaissance. Maybe there’s room for a new Deus Ex, as well. Eidos Montreal’s policy of “long development cycles” bodes well for a quality threequel, even if it means we’re going to have to wait even longer for it to manifest.

In the time being, they’ve been kind enough to throw up a teaser trailer, with the camera circling around an augmented fetus. “What makes us who we are?” seems to be the driving concept and it certainly falls in line with the series’ classic focus on genetics and making important, story-changing choices. There’s not much else to glean, but the ambient background music taken from the original Deus Ex really brings back memories.

Now if we could only get Fox and WB to kiss and make up so Monolith could get to work on the next Kate Archer adventure.