IF you want a World War Z Advanced Mode, play Back 4 Blood. The only downside is you need to collect amazing selective cards for perks, and we are not talking about survival anymore but BANG BANG SHOOT SHOOT SPUDOOWWW SCKRSSHSHH WOOJJJ BOOKKH BOOKKH, that kind of game.
I swear, this is like playing CODM on Meth (just a simile of playing the game with bunch of nonsense thrown at you). It is still a fun game that has no inkling of resemblance to its milked-franchise, the Left 4 Dead. It is more like USING THE NAME TO ATTRACT ZOMBIE SHOOTER GAME FANS. I only rate it low despite being mid, in my opinion, is because it tried to ruin the good name of Left 4 Dead that is precious to my heart and still being played till this day. Such a sorry excuse of a game. Very shameless using the brand name of Left 4 Dead. Instead of promoting their own game, they are using the name of a best selling most competitive game in our generation of zombie shooting games. Turtle Rock Studios is a huge sellout. I hope they don't make anymore games after this one or the DLC. They will just keep on using Left 4 Dead and now Back 4 Blood's name when they make a new game after this one.
They really try so hard to stay relevant.