"Sometimes you look at games and think, ‘Oh, that game had it easy because they put streaming doors there, or this or that.’ What actually happens – Nintendo are masters of this – is we try to design so that our time is spent on the game. How do we not spend ages working on things that won’t actually improve it? Well, we build a wall round the outside. Players will know very clearly where the play area is, and they won’t think there are things behind that." - game director and co-founder Sefton Hill
That's just one small snippet from a major interview about the creation of Batman: Arkham City. Check out the full interview here.