The 1st Left 4 Dead version faces game crash issue. And the next release Left 4 Dead 2 also facing the same crashing issue. After searching online for crash fix solution, I found some that might help you all.
Tag: L4D2
Left 4 Dead 2 Patch ~ crash to desktop fix
Woo… If the Left 4 Dead 2 crash fix solutions cannot help you solve the crash to desktop (CTD) issue, here is an unofficial patch that I found from China website. While waiting for the official patches to come out, why no try out the unofficial one. Just overwrite the files with the 7-Zip file. Enjoy the game…
Download the Left 4 Dead 2 Patch here (link removed).