I Got Stuck on a System Bug in the Apocalypse

An apocalypse novel with infinite worlds: zombies, disasters, rebirth, mechs, farming, a System, pocket dimensions, and stockpiling supplies. This apocalypse has everything you're looking for.

The protagonist is decisive and ruthless, neither a bleeding heart nor an idiot. He plans ahead and acts with astonishing force, and from the start, he even gets a hydrogen bomb.

Ever since the protagonist learned how to exploit the System's bugs, he no longer has to worry about the dangers of the apocalypse.

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.