We used the full version of Counter-Strike:Source for our testing. All in game settings were set to their maximum apart from anisotropic filtering and anti-aliasing, which we varied for different portions of our testing.
Our benchmark is based on a custom demo recorded using the cs_militia map. There are a lot of trees on this map so it makes heavy use of transparency anti-aliasing when this feature is turned on. However we haven't chosen to use this in our testing today.