Original Post
Big(or "Huge" as the case may be) worlds are overdiscussed here. What features would you add to deepen a small game world, one which is restricted either by setting(space station, island), or gameplay (rail-shooter, one-on-one fighter)? There are three "traditional" ways of deepening the world that I can think of: The main traditional method we all know about: story. If it's integrated well with the game, it can work, but I think it's treated too much as a "band-aid" solution. Unless it's the overwhelming centerpiece(as in a Final Fantasy, adventure game, etc.), the story only helps a game that was already good. Another old standby is the mini-game. It's a nice way to relax the tensions of the main game, and perhaps tie back into it with a reward or needed item, but it's not really something you build the game around, which you can at least do with the story. Finally, there's the secret. By pushing every wall or somesuch, you can get a little trinket. It's a pretty worn-out trick by now, at least to an older player. How can we expand on this list? (Remember, an answer that needs more content isn't an answer because it'll make the world bigger)