So I'm working on a gamebook with two narratives. When you finish the first, you have the option to try the second. When you finish both narratives, and only if you do both, you get to choose which side to be on. However, I can't figure out a way to do this without basically copying the whole game and repeating every page...

Alternatively, is there a way to make an option only appear when you have completed both narratives?

see above