Everyone has a threshold with regards to horror; once that threshold is overshot, it might be harmful to the person's health. Chen Ge read the various Side Missions again, and just the mission description alone made his skin crawl. Most importantly, these were just Side Missions; the finale was still locked. Logically speaking, Chen Ge had to finish the eight Side Missions first before he could unlock the final mission.
My House of Horrors
Horror · I Fix Air-Conditioner
detail