Onyxmeth on 10 August 2008
I don't know. I bought the game outright and then started playing, so when I entered World 3 I didn't exit it until I finished it and then World 4 was available. I suppose it would have been the same for me had I quit mid way through World 3 to get back to the house. I do know that World 5 and 6 open up simultaneously and can be played in either order.
Tag: Became a freaking mod and a complete douche, coincidentally, at the same time.
