Armored train at the end of the world

Week 1 "1,224 people are squeezed into 40 carriages, but only 2 people can live in the front of the train - what makes you qualified to get in?"

Month 1 "Zombies will evolve, and trains must evolve too: 1.2 cm steel plates have been welded, and a machine gun position on the roof has been reserved."

Month 2 "With talent, the research and development progress is different. The survival exoskeleton: Scavenger-1 type has taken shape."

Month 3 The train driver who tore the armor, the boy in a wheelchair holding up the train, the female master who rubbed the flesh and blood mecha with her hands...

- "Conductor's Log" We crushed the tide of corpses with steel wheels, connected the broken tracks with supernatural powers, set up flamethrowers in the plant frenzy, and when other survivors begged to get on the train, my attendant was baking cranberry cookies.