seta intro "1"
Game pad controllers are not supported by Modern Warfare 3. Please check our controller page for information about how to hack controller support into the game.
With some users, a black screen will display on start-up, though game music can be heard in the background. This is caused by a collision with the Mumble voice client. Within Mumble, be sure to disable the in-game overlay.
This is a Microsoft C++ bug so the quick fix is to uninstall your C++ files. If you see 2 instances of Microsoft C++, uninstall both of them. There are also a couple workarounds online if you don't want to uninstall them.
C:\Program Files (x86)\Steam\steam.exe -install D:
Set Image Quality to "Native", as "Extra" up-scales the textures resulting in poor image quality.
Appended the game laucher with -dx9 to force DirectX 9 compatibility mode.
"seta rRendererPreference "Shader model 2.0""