MTL - Book of Technology - Chapter 437 deal with

Ruins stretched across the landscape in the apocalypse after the nuclear war.

“The world underwent a mutation that year. The game world appeared in reality and various disasters started to ravage the world.

To resist all of this, everyone had to plan for their job choice, manically level up, and strive to become stronger.

There were mages, warriors, knights, and summoners—over 100 different kinds of jobs. This was a job that a person would be stuck with his entire life. Thus, everyone chose cautiously. Out of this dazzling array of jobs, Moses picked Knight—which had the most average ability value—to be his job.

At the same time, he also awakened the Hundredfold Increase System.

“”Ding! Detected that the host learned Shielding. The skill has become Absolute Defense after the hundredfold increase!””

“”Ding! Detected that the host learned Defensive Domain. The skill has become No Damage Domain after the hundredfold increase!””

At the same time, Moses also discovered that his job could evolve infinitely!

“”Ding! Detected that the host’s Knight job has met the conditions for a hundredfold increase. The job has become Great Knight… Paladin… Impregnable Fortress!”

Who needs a Class when you're already the strongest anyways?Ten years ago, Amelia woke up alone and lost in a broken world where she had to fight for her survival.Now, after reaching the pinnacle of power, defeating the Void itself, and escaping the abyss, she has finally found her way back into the real world. But instead of returning to Earth, she arrives in the land of Vacuos. A fantasy world with magic, monsters, Classes, and Levels. A world that is governed by a System like it were a video game.And when rewarded with a Class befitting her accomplishments— to become a powerful [Hero] that will forever dedicate her life to protecting this world that is not her own— she only has one response.“Absolutely not. I’m going to live a normal life now, thank you very much.”