Castle Magus

From what I remember of messing with TADS several years ago, it was indeed very similar to coding with something like C/C++ or Python or whatever. It's just that what with it being a game engine and all, a lot of the functions are already written for you. Not sure with the newer stuff like Unity or Gamemaker or whatever, as those are likely more visual GUI based, but I'm sure there's still some coding/scripting involved regardless.