agreed, L4D's Doom like spawning of "zombies" is lame, this really seems to shallow for a "Valve" game, but then again Turtle Rock has only produced garbage. To call them "zombies" is a disgrace to all zombie fans.
CoD's zombie mode is fantastic, new lan champion IMO, its super fun with 3 friends. Good real zombies and what other game has you barricade and defend yourself against zombies? More maps would be nice, but still the best reason to BUY CoD5.
The SP is really bad, more linear then again game i can think of, but the MP is stellar, a lot better then the disaster CoD4, in fact best CoD game since the original thanks to bolt action rifles again, I just can't wait for the ProMod to come out!