Except every single cod that had a dlc for zombies. What say world at war, black ops, black ops 2. Zombies is a mode in cod that in my opinion will stand the test of time and never lose its fun factor. It has an aspect of challenge that cant beat. It is always a challenge to me and each time I challenge myself to beat my last highest wave. I would pay 20 dollars for a zombie mode just because it is exactly that much fun. Just like I would pay 20 dollars for a destiny dlc. Because it is just that fun. They reduce the price to 20 I got no problems but 40 dollars is too steep