He transmigrates to a wasteland era and gains the ability to enter game worlds.
Complete missions, and he can bring all sorts of items back with him.
In a bridge-building game, he pockets all the project resources for himself.
In a thief simulator, he becomes a master thief who leaves nothing behind wherever he goes, not even a scrap of land.
In a doomsday-preparation game, he builds a rocket by hand.
Zombie extermination plan? No, zombie labor-reform program!
By acquiring items and technology in all kinds of games, he sets out to build the strongest city in the real world!