Oh you can totally get too cute with metatables. I've seen inheritance/straight-OO(Java/C++ style), component based design, and eventing/message based approache

Oh you can totally get too cute with metatables. I've seen inheritance/straight-OO(Java/C++ style), component based design, and eventing/message based approaches all with the core primitives that Lua provides. I think my favorite one was one that used yield[1] with the parameters being the number of frames to resume the execution of the coroutine. That was used by a number of our game designers to write AI scripting that felt close to literate programming(I.E. "move x, look for player, yield 30, if found player, go here, etc). You could build a whole AI state machine that fit into one page of code and was very easy to follow. [1] https://www.lua.org/manual/5.1/manual.html#pdf-coroutine.yield https://www.lua.org/manual/5.1/manual.html#pdf-coroutine.yie...