Sorry, but it's impossible to settle on just one.

Starcraft

Knights of the Old Republic

GTA: Vice City

Call of Duty

I had plenty of trouble with Team Fortress 2 even after its updates, playing around with drivers and launch options (-nosound, dxlevel 8, 8.1 etc). But this finally fixed the sutter freeze for me. Works real good and it's pretty simple.

http://forums.steampowered.com/forums/showthread.php?t=602305

Just wish to share this info with others who might still be frustrated with the damn in-game freezes.