[Unknown]

[SonyPortableizer]

[Unknown]

[bicostp]

Are you trying to run it on Wine, Parallels, or Boot Camp?

http://store.steampowered.com/app/550/" onclick="window.open(this.href);return false;

[SonyPortableizer]

it was cider, and I hypothetically got it working by mashing keys. Next question, hypothetical again, kets say I have a v 1.0.1.5 version of the game, but everyone else has 1.0.1.7 how would I go about updating my version of the game?

[bicostp]

Download and install this utility, it can update L4D.

[SonyPortableizer]

Im doing this on a mac... that wont work to well.
On another note, I put Cod6 on my mac, then into a ported steam. Could I activate it with a key, then be able to play online?