I think they want to capitalize on the momentum L4D has before it fizzles out. Kinda like adding another log before the embers go out.
That and they know halflife fanboys are going to wait...and wait...just so long as it doesn't go on 10+ years, like some other promised game we all hoped would come.
That and they know halflife fanboys are going to wait...and wait...just so long as it doesn't go on 10+ years, like some other promised game we all hoped would come.