It’s driven by nuclear war, but check out Metro 2033 by Russian author Dmitry Glukhovsky. It takes place in the Moscow Metro where people live after a prolonge

It’s driven by nuclear war, but check out Metro 2033 by Russian author Dmitry Glukhovsky. It takes place in the Moscow Metro where people live after a prolonged nuclear winter (with mutants). There is a subsequent video game series derived from the book.