I'm Hacking and Killing in the Wasteland

Chen Nian traveled through time and traveled to the wasteland. "Uncle! Why don't you travel to the wasteland instead of traveling to immortality?" When Chen Nian first arrived, he discovered that in this world, zombies, monsters, and ghosts were rampant, and humans could only settle down in a corner, huddled in ordinary tribes. "In this case, as a time traveler, I will be your savior!" As a result, Chen Nian, who was just about to show off his skills and conquer everything, heard the call from the abyss in his life, "The system has been bound. Please upgrade the host according to the mission." "What the hell...!?"