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by 60654 1607 days ago
Age of Empires 1 had AI scripts that were written as production rules in a very Lisp-like syntax. (You can still find some online.)

Not sure if they integrated a full Lisp or Scheme system, but since the rules were not arbitrary source code, nor doing unification, etc., they could have just hand rolled a custom reader, and written the rule engine itself in C...