An idea that could be built from the in-game Perpetual Testing Initiative Editor.
So I had an idea, which I already know is fairly plausible which is why I am bringing it to the community to discuss. Don't sit there and tell me "No, that would not be possible" unless you actually know what you are talking about, because after all this isn't a question, it's a discussion of an idea, which really aren't the same thing. Anyway, with the Hammer Editor being the primary way of making Custom-Made campaigns, and maps, and levels for all Source games, yet of course Portal 2 has a secondary way to do so, yet the possiblity of a simple map editor and maker has never even (As far as I know) been discussed for other games, Such as Left 4 Dead 2, what would you think of something like that?, A simple way to create maps for all your favorite Source Games. The map editor would automatically compile map through the source engine and then you could upload it the Workshop, simple as it is in Portal 2. So Why Not Other Games. I would like to hear your thoughts on the matter.