Half-Life Fallout: Mowgli - Viewing Profile

Turns out there's a frame skip when out of focus built into the HL2 engine. Can't be fixed without some programming knowledge. Here's to hoping valve makes CS:GO split-screen friendly

OK so I've officially got this working!

I used this site to map the second XBOX controller to the mouse and keyboard.

Only issue is the jerky framerate and no sound on the window not using the keyboard/mouse hack. The keyboard/mouse window must be focused for it to receive input. This causes the second window to be treated as a background process. If there's some way I can change how often to update HL2.exe when it is a background process, this should fix it.

Yes on my system - on most mid-range desktop systems.

There is a frame rate drop when the window is not selected, but it's a consistent drop, so I think that has something to do with how fast Windows updates background apps. I think there may be a fix.