Comment by TonyNib

There's probably better ones avaliable now on github, but this one caught my eye.

I was wondering, are there any examples of mazes (real or programs) where the structure, rules or walls change based on a certain algorithmic pattern?

So that you've not only got to find the right way out, but you must crack the code before a way out is even possible.

Kind of like the movie Cube: http://www.imdb.com/title/tt0123755/