Banks are handing out game studios now? Did you get one as well?

Perhaps you forgot what you asked? You said:

> How did this person become the sole shareholder of a 100 person game company producing wildly successful game without any work in your story?

Steve Jobs somewhat famously never wrote any code for Apple. So the answer to how a person becomes the sole shareholder without doing any work is that they focus on things like bank loans, which enable the hiring of people to do the "work" that leads to the company's success. Same as any company.

Many, many, many companies are headed by people who have never engaged in the low-level work done by that companies. Many of them are there because they deal with finance.