Land of Lisp

Attack of the Robots!

Here, we look at a game so horrifying that it’s sure to give you nightmares: Attack of the Robots! In this game, robots have taken over the world, and it’s your job to destroy them. Though the plot may sound scary, the part of this game that will really give a Lisp programmer nightmares is the way it abuses the loop and format commands in order to squeeze a fully functional robot-fighting game into a single page of code! (This program uses the “crazy formatting trick” discussed in the previous section.)

I have annotated the code with some basic explanations. If you want to understand how the game works in detail, you’ll need ...