So, lately i've been running low on Internet credit so i can't afford to play l4d 1 or 2 online. So what can I do?? I'll tell ya, start L4D in console, load a map in singleplayer, set 'director_panic_forever' to 1 and then trigger 'director_force_panic_event'.
I usually can't survive the first level XD
50KB? 1MB?