Finally, they reached the at the very top of the city. B-12 realized that to open the city’s massive roof and let in the sunlight—which would kill the Zurks and free the robots—he would have to sacrifice his own systems to override the ancient security locks.
Their journey took them through the , where robots lived in fear of the Zurks—flesh-eating bacteria-mutants that could devour metal and bone alike. To escape, B-12 and the Stray had to find the "Outsiders," a group of rebellious robots obsessed with seeing the "Outside," a place many Companions believed was merely a myth.
The Stray, now alone once more, stepped out of the heavy blast doors. It sniffed the fresh, open air of the surface, looked back at the glowing city one last time, and disappeared into the green foliage of a world reborn.