SplitPlay PC - Play SplitScreen Games on PC

 Left 4 Dead 2
The program creates an 'autoexec.cfg' and adds it to your L4D2 folder. On that file, it adds the map, the mode, and every configuration to make the game run on splitscreen.
If you want to use 2 monitors, normally you would need to download SoftTH and hexEdit a VPK file from L4D2. The program does all that for you, the only thing you have to do is press F8 when the game loads.
The game works perfectly on Left-Right, Top-Bottom and 2-monitors Left-Right (3840x1080 tested here).