Doomsday: I, the Extraordinary Mechanic!

It was the year 2055. The Zombie Virus had erupted and doomsday was near. The world order had collapsed!
Humans used nuclear weapons once again to eliminate zombies all around the world. They cleansed the population with the extreme means of destroying cities.
However, what they did not expect was that zombies had unimaginable vitality. Not only did the nuclear weapons not eliminate the zombies, but they created an even greater disaster for humanity. Nuclear radiation ravaged the world. The water was no longer clean. The ground became dead zones. Even the houses they lived in were no longer stable.
The zombies even mutated to become fiercer and more terrifying! Humans struggled to survive under the arduous living conditions and manic zombies.
Jackson awakened the Supreme Mechanic System and was living extremely comfortably in the post-apocalyptic world.
When the others were still fighting each other for a piece of bread or bottle of water, Jackson had already created a water purification machine and was having a bubble bath with clean water.
When the rest of the population were still hiding in ruins and shivering in fear, Jackson had already modified an abandoned factory into a sturdy refugee base. Unmanned blasters, giant destructive cannons, superpowered scout robots, laser towers… There was only one rule for entering Jackson’s refugee base… You have to be a woman!