Left 4 Dead
We tested Valve's zombie shooter using a custom-recorded timedemo from the game's first campaign. We maxed out all of the game's quality options and used 4X multisampled antialiasing in combination with 16X anisotropic texture filtering.
The scaling theme we established on the previous page continues here: the 4850 is faster at the lowest resolution, and the GTS 250's relative performance becomes increasingly stronger as the resolution rises. Still, both cards produce nearly 60 FPS at 2560x1600, so playability is never in question.