I see the page is up now and it has Zelda 1 listed as a bad example. It probably shouldn't be there... whether you consider it grid-based or not (as I've already said, it is grid-based in a wierd way; boot it up in an emulator and pay close attention to what happens when you change directions) is a matter of debate but for that reason it's probably confusing as an example.
I havent made much in the way of tile based games, but i'd like to enter this comp.
Just a question, does every object (say we have a tile based game 10 by 10 pixels) Have to be within those limitations. i know the character does, but like trees, houses, and enemies. They don't do they?
oh and another question, does every enemy have to move on the grid, or is it just the player controlled character
I asked Shab the same thing. I think it's basicly that everything which can affect the gameplay or main character does have to move in a grid(like enemies, powerups etc).
Backgrounds,texts and healthbars and such doesn't since it's just cosmetic stuff.