If you are using a wired controller, plug it into the USB. If you are using a wireless, you need to purchase the wireless PC adapter if you don't already own it. Then launch Left 4 Dead, and go to controls and enable the developer console. Then type "exec 360controller" (without the quotes) and press enter. This is will disable the keyboard and mouse, and set up the controls for the 360 controller.
you can on left 4 dead 2 just go on scavenge then when the part where it connects you to players cums up just press the X button simple as
4 players can play in Left 4 Dead 2.
No
yes for ps3 and xbox360 but not for the wii
Yes
A Xbox360 is a console, the second after the first Xbox. You play Xbox360 games on it and I think you can download or buy a thing so you can play your Xbox games on it to.
Left 4 Dead can be played on either PC or Xbox 360.
Yes, you can play left 4 dead 2 on steam if you buy from Gamestop.
yes you can play the beatles rock band with the xbox360 controller if you have an xbox and if your singing
Yes you can play online
You have to download Steam on your computer, then Left 4 Dead 2 can be bought from that.
One can definitely play Left 4 Dead on their own. But it is more enjoyable when other people are dying along with you. :)