This flashy romp from 2000 is still regarded by some gaming pundits as one of the best PC titles ever.

It's easy to understand why, given the gripping conspiracy-laden plot and unique, immersive gameplay. It's easy to get lost in the lavish sci-fi settings, enhanced with the solid Unreal Engine. This groundbreaking game has since spawned a number of sequels/prequels, but it's tough to match the iconic status of this originator.

Like Doom before it, Ion Storm's Deus Ex feels like a true evolutionary step in shooters, with its infusion of RPG elements and nuanced augmentation system.