RipClaw
Hunter
The question is how unpredictable the behavior becomes.I expect a sea of....err, posts... when AI becomes much more unpredictable, since it will force players to adapt from a single predictable path, requiring a single predictable defense strategy, to a more "defense in depth" look at bases.
An example of completely unpredictable behavior would be if a zombie happened to stop somewhere and start destroying blocks for no apparent reason.
Unpredictable can mean anything. The zombie can run in direct line to the player and destroy all blocks between him and the player, the zombie starts to cut down all trees in the area, he runs behind the base and destroys the wall or the zombie stops the attack and goes to Buzz Bar and drinks a beer there.
There should be just some basic rules for the behavior of zombies so that no uniform behavior is given but nevertheless a certain predictability.