The world of Half-Life 2 has amazed everyone with its great story, graphics and Valve's great support. Half-Life 2: Episode One is the first in a series of new adventures created by Valve that extend the Half-Life 2 single player experience. It details the aftermath of Half Life 2 and launches a journey beyond City 17.

Stepping into the hazard suit of Dr. Gordon Freeman, you face the immediate repercussions of your actions in City 17 and the Citadel. Rejoin Alyx Vance and her robot, Dog, to once again aid the human resistance in their desperate battle against the totalitarian alien menace of the Combine.

Episode One exposes Alyx's combat skills and knowledge of City 17. Battle side-by-side with her through Valve's first episodic game, a four-to-six hour adventure of greater density and detail than non-episodic releases.

We recorded a timedemo and used the built-in console to run the timedemo with each card. All tests were carried out at 1280x1024 with HDR shadows fully enabled. Antialiasing and Filtering modes were enabled from Nvidia's 3D control panel:

The HL2 Engine always has been a favorite for ATI based cards. The PowerColor X1950Pro is no exception, managing to reach the XFX 7950GT. The eEVGA 7950GT KO remains fastest with 122FPS.

With HDR Effects and AA/AF enabled providing the highest possible visual quality settings, the EVGA 7950GT KO is still the fastest card but the PowerColor X1950Pro is no more than a couple of frames behind.