You could check out 'The Veiled Warrior'. In this manhwa, the warrior hides their past and faces various challenges as their past catches up with them. Also, 'Forgotten Memories' is a good choice, as the main character's hidden past drives the story forward and creates lots of suspense.
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 story of redemption where the player tries to overcome his past mistakes and find a new path.
It could be a tale of mystery and self-discovery. Maybe the player has a dark past that he's afraid to reveal for fear of judgment or reprisal.
It reveals the past gradually through plot developments and character interactions, keeping readers engaged and curious.
Since I don't have in - depth knowledge of this light novel, it could be that the 'player' has a dark or complicated past. Maybe he was involved in some sort of scandal or had a difficult upbringing. The story might show how his past affects his current actions and relationships within the context of the light novel's world, whether it's a virtual game world or some other fictional setting.
I don't know for sure as I haven't read it. But most likely there is the player himself who is the central character. There might also be friends or foes he interacts with who play important roles in either trying to uncover his past or helping him keep it hidden.
Maybe he has some dark secrets in his past that he doesn't want to be known. For example, he might have been involved in something illegal or unethical that could damage his reputation in the world of the web novel.
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.
It can create suspense. Readers will be curious about what he is hiding and keep reading to find out. For example, it might be revealed gradually through flashbacks or other characters' investigations, which adds an element of mystery to the story.