[JimmyAustin]

I've heard a similar anecdote about a racing game (I think it might have been in Forza) where the developer had a AI where individual racers could hold grudges and that would affect how aggressively they treated you (bump someone in lap 1 and they'll be more aggressive in lap 3). Eventually they had to take it out for various reasons, but didn't advertise that fact for obvious reasons. When the game was finally released several reviewers brought up the feature as a plus, not realising that they were just reading into the actions of the standard AI.

As a side note, the writeup of F.E.A.R's AI is a fascinating read. By combining very simple goals and actions, they created AI that is still remembered as incredibly good. http://alumni.media.mit.edu/~jorkin/gdc2006_orkin_jeff_fear....