Global Doomsday: I Have a Hacking System

In 2777, plants and animals mutated due to nuclear wastewater around the world, and I awakened the hacker system, modified the quantity and attributes of items, and started with a kitchen knife that made me chase zombies. It was not an ordinary kitchen knife. Its damage was higher than that of firearms. Wasn't the backpack enough? It seems that I can fit a large truck in the small space inside the modified capacity of 999. Is it enough to awaken the power crystal? Look at my modification number 999 This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.