Left 4 Dead 2 is easily one of the best multiplayer experiences ever created. The crazy amount of special infected zombies ( fuck the Tank though. He is an asshole), the crazy melee weapons ( the chainsaw is cool!), the awesome characters ( Coach is mah nigga) and simply the amount of fun you can have killing zombies with your friends!
Sales-wise Left 4 Dead 2 is a success hands down. It sold 3.7 million on the Xbox 360 alone. However, as we all should know by now, most of L4D2's sales come from Steam since it is a very played game over there. No joking. There are tons of people playing the game every minute!
So, do you want to see Left 4 Dead 3 come out? The community for L4D2 is still strong and the sales are great so I don't see why it shouldn't come out.
---Member of the official Squeezol Fanclub---