This Space Is a Bit Stuck

A young and promising young man traveled to the future. Forget about the future, it's still the end of the world, zombies are breaking out, he has some space, and he's still cheating on his father. There is a system, but it is still so cheating if I change it to something else. NPCs are invincible these days. Comrade Xia Mu said: You guys are going to kill me just for playing a fucking game. What a cheat.