11. Half Life 2
Half life 2 is no doubt the most anticipated pc game of all times.
Physics - From pebbles to water to 2-ton trucks respond as expected, as they obey the laws of mass, friction, gravity, and buoyancy.
Graphics - Source's shader-based renderer, like the one used at Pixar to create movies such as Toy Story® and Monster's, Inc.®, creates the most beautiful and realistic environments ever seen in a video game.
AI - Neither friends nor enemies charge blindly into the fray. They can assess threats, navigate tricky terrain, and fashion weapons from whatever is at hand.
We have mentioned this in the past and we will repeat it again, a very good and fast card like the 6800 series from NVidia, the X800 or X850 from ATI, require a lot of CPU processing in order to perform at their maximum. Although the D 840 was not the fastest at the lower resolutions, at 1600X1200 it proved more capable.