Here's something that I've been wondering. Let's take a game like Minecraft and make it 2d. You can move around endlessly, but when you return to the areas that you have already been, it remembers what you have done. I would imagine if you wanted to make a world that was huge, you wouldn't make it ONE layout. It would be many and when you return to another layout, it would have everything you have done to it still there. Anyone?