Hello all... i Sindhu will give tips how to play left 4 dead 2 in splitscreen or play left 4 dead 2 with 2people in one pc.

1. you play left 4 dead 2 and open option then enable a developer console
2. open developer console with "~" and type "ss_map mapname" without quote and mapname change with name of map you will play
3. when game start open again developer console with "~" and type "connect_splitscreen localhost 2" without quote
4. and you can change splitscreen mode by type "splitscreen_mode 1 or 0" in developer console
if you play with dual joystick and have a problem with the control... you can download my controller config... after you download then extract the folder to left 4 dead 2-left4dead2-cfg and replace it....
Thats all.... i hope this work for you.... SORRY FOR MY BAD ENGLISH