World Online: Rise of the Strongest Hero

The accident that killed his entire family turned Elijah into a game addict who didn't care about his life anymore. After excessive playing, Elijah finally died upon completing the same game for the 1000th time. [Kill the demon king and become a hero in the game world.] [Customized rewards will be allotted.] Elijah was willing to take the risk of diving into hell, hoping he could reverse the time and save his parents from dying. But upon progressing in the game with his task, Elijah discovers that there's something wrong with his system. [Attention! Going without sacrificing an NPC will increase your mission failure by 90%!] Elijah thought he was there to be a hero. However, why did he think that the system forced him to sacrifice NPCs in every way possible?