Decades back, I first played Simon's Quest (Dracula 2: Noroi no Fuuin) on the Famicom Disk System. I loved Castlevania 1 on the FDS but the second game was more puzzle based full of clues in Japanese text. I really wanted to know more about the in-game story and finish it so I bought anything that could help me. (No Internet yet. The U.S. version of the game, Simon's Quest was not sold in my country but gaming books and magazines from all over the world were.)
One of them was a novelization of the game: Worlds of Power (4) - Simon's Quest. The author turned it into an Isekai (long before that word was known commonly) and made it about a typical teenage high school boy who somehow ends up in Simon's Quest. It was really weird, almost comedic putting in elements that made it resemble a Saturday Morning Cartoon. It definitely wasn't the actual story so I had to filter out the idiotic parts and process the original plot line out of it somehow. There were clues on beating the game at the end of the chapters and one of them proved to be a key clue but it wasn't enough to win the game (which I eventually did in time). If it wasn't for that clue, I'd be more critical of the novel.
In any case, as anyone who's played Simon's Quest, most of the clues in-game were lies and useless so even if I did understand it, it would probably confuse me even more. In the end, I pieced together the clues from the novel, absorbed some tidbits from other game magazines and even learned some Japanese to translate some parts in order to win the game.