Ok, so I just came up with this crazy idea. Left 4 Dead: Origins. It's and idea for a new L4D game. It (If this game is made) takes place in a laboratory where the virus that turns people into zombies was made. You play as four scientists who are immune to the infection. As you progress through the game, you see how each special infected became infected. There should also be a lot of new weapons, like throwing knives. If you feel that this is something you would want to see, then leave a comment and try and help me get this noticed by Valve.