Black sheep wall

I chatted with my friend and mentioned an old computer game Starcraft.

Then I recalled the cheats of the game.

By the way, what do you call the "cheat" I mentioned above? I mean when you play a game you type some codes and your role becomes powerful and then you can finish the mission easily. What do you call these codes or the like?

Well, to the point. I recalled some codes (allow me to use this expression first) like:

black sheep wall----when you type this in, your map becomes all clear and you can see your enemies

food for thought---- you gain maximal food.

My question is, do these two expressions make sense? Idioms or something? Or the game company just created them?

Thanks in advance. I hope I make my question clear.