Any source mod cannot be an example because it uses ready stuff. It's like a constructor where you only have to create your own textures and do a bit of modelling (if you really want your game to look unique, otherwise you can use stuff that's been already used in other games).

Only an idiot can give an example of a game like Alien Swarm to compare it with indie stuff. If I knew that there's a chance for you to say such hilarious bullshit, I would've also restricted you to indie-only games.


And yes, I believe that this will be implemented.