You can play Four Swords with four people, three people, two, or one - but, unlike the GBA version that comes with Link To The Past, the experience doesn't change depending on the number of players you have. So, if you're playing with two people, each person gets two Links that can move in different formations. It's pretty fun, I doubt that you'll become incontinent with joy while playing it but it's better than a kick in the dick. It also uses the GBA connectivity in some new ways - any time you fall in a hole or enter a building, basically any time you are not on the overworld adventure map, you enter (or in some cases "fall into") the Gameboy. If you do decide to play it, though, you might as well familiarize yourself with the archetypes.