What has been called AI in gaming in the past is rich and varied, and goes all the way down to a computer control opponent “seeing” a player and opening fire, moving towards, or moving away. Any code controlling NPC was referred to as “the AI of the game” even if all the code was doing was applying a few simple rote rules rather than following an exactly pre-specified sequence.

“AI” in gaming means (or has previously meant) a lot less than “AI” has meant in other fields, but with the increasing use of “AI” in all contexts this will soon no longer be the case.