Half-Life 2: Episode Two
We used a custom-recorded timedemo for this game, as well. We tested Episode Two with the in-game image quality options cranked, with 4X AA and 16 anisotropic filtering. HDR lighting and motion blur were both enabled.

The GeForce GTX cards look relatively stronger here, with the 280 basically matching the 9800 GX2 at 2560x1600. The GTX 260 keeps some distance between itself and the 3870 X2, too. Obviously, with everything but the single-GPU Radeons churning out nearly 60 frames per second at 1920x1200, most of these cards will handle Episode Two just fine on most displays.