Board Thread:Off Topic/@comment-33105209-20171007160821/@comment-34180095-20180123004141

KR1570 YT wrote: Maybe we can't go across the other side of the world behind the wall of flesh because it's the Hardmode World and the other side is the Normal world. So, Wall of flesh is the one who seperates hardmode and pre-hardmode.

That's my theory :/ This also makes sense