I recommend "The Game Designer of the Underworld Begins from the Explosion of the Phone". The protagonist of this novel also entered the game world because he played mobile games. There were all kinds of netherworld games in the story, and there was even a system that allowed players to enter the game world. Moreover, the main character was a game producer, so he could create more netherworld games in the game. This novel also had sci-fi elements. It was very suitable for readers who liked to play games and enjoy the elements of the netherworld. I hope you like this fairy's recommendation. Muah ~😗