"Initially was intended to be a totally different game with any connection to WoW cataclysm Gold," Saber Lead Game Designer Dmitry Grigorenko told me. "Funny thing isthat when you design a co-operative shooter game that is based on zombies, there's a limit to the ways you could take it. At some point in the development, following another playtest, we sat with a group of people and decided, 'Okay, our game is starting to look very similar to WoW.''' Grigorenko stated that the team had begun to research the way that WoW Cataclysm Classic's famous AI Director was acting to see if Saber could develop something like it.

This issue was progressively bigger for the team, since it was required to recreate the appearance of its original materials, such as the mountainous crowds of WoW Cataclysm Classic that far surpass the size of the horde within WoW Cataclysm Classic. "Adding additional zombies may sound easy on paper, however our zombie swarm system is extremely complicated. Zombies need to behave as real crowds; you are not able to achieve this by simply increasing the number. Animation, AI and level design should collaborate very well in order to ensure that these sequences are modeled after scenes from the film."

"AI Director" is the name Valve chose to describe the procedurally-generated sections of every level. With just a handful of one-hour games in the game WoW cataclysm Gold for sale wouldn't mean any one when it ended after just one or two times through the game. But the amazing AI Director made sure it would be played for many years to come by deciding how enemies would spawn in the first place, their location and the best time to allow them to swarm or crush the players' team depending on the information the game was able to gather each level. It even altered certain paths in levels, which could throw experienced players out of their element sometimes.