Comment by ecshafer

Age of Empires II had a creative map editor, where you could "program" via triggers and effects. It wasn't as in depth as the blizzard games which you could write code, but was easier to use. You could make a trigger (ie. units in this area, time passed, number of units on the field, build a building, etc) then effect (ie spawn unit, move unit, kill something, etc). Which was used in custom maps to do all sorts of fun games. Or like here you can make a nand gate by moving units around.