Zombie Apocalypse

When the zombie apocalypse broke out, I acquired the system, killed among the zombies, obtained crystals, strengthened myself, and reached the peak step by step. However, the good times did not last long, and a super powerful zombie appeared, knocking me off the altar. I obtained stronger weapons, fought back against the zombie king, and finally became the master of the world. But the zombies haven't been cleared out yet. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.