Hi Guys, I have recently been playing thro Left 4 dead 2 after maybe not playing this game in at least three years... The dlc is excellent and I believe it's also free on steam, my gripe with the game has to be the source engine. I love half Life, and have been hoping for a third episode in the series for a few years now, or even a remastered version of the original game, but can source handle it? I have heard about the source 2 engine coming into existence in the near future, but it has to be said source has been left for dead by far superior engine's ( forgive the pun) is source holding valve back from giving us some much needed and great games?