I was thinking of saving for getting a new game or two for my Vita, and I was wondering if any require the use of a guide to get the most out of them (i.e., optional playable characters, best endings, and other things that might require a guide to find). That said, do any require a guide? (I'm particularly curious about Akiba's Trip, since I had my eye on it for a little while...don't judge me...).