It could be that revealing his past would put him or someone else in danger. Or perhaps it's just too embarrassing for him to share.
The player might change his identity or keep silent about his past. Simple as that.
Maybe he uses disguises or changes his identity to hide it.
The player might hide his past because he's ashamed of it or because it's tied to something that could prevent him from achieving his goals in the story.
Maybe he's afraid of being judged or has something to protect.
Maybe he is ashamed of it. Some past works might not be up to his current standards, or perhaps there are elements in the novel that he doesn't want to be associated with anymore.
The player might hide his past because it could affect his current relationships or status in the story. Maybe it's related to a mistake he made and he's afraid of being judged.
The player might change the title and his name associated with the novel so that it becomes difficult to trace back to him. He could also use some legal means like copyright restrictions to limit its availability if possible.
It's about a character who has a mysterious and concealed past that gradually unfolds as the story progresses.
The story might revolve around the player's efforts to keep his past a secret while facing various challenges and interactions in the present.
It could be a tale of redemption as the player confronts and overcomes the challenges from their past.