Gamers want realism, but we also want enemy AI to respect our need for fun, meaning we don’t want our enemies to be super smart. We need our inept guards to eat discarded poisoned rice balls. We need our machine gun-toting soldiers to ignore a conspicuous cardboard box. Otherwise, the game wouldn’t be fun. A truly intelligent enemy NPC is not what we want. We don’t even want artificial intelligence. We want scripted behaviors based on shortcut heuristics with game balance--not realism--being the end goal.
