Employees might be stakeholders depending on whether or not they have a desire to see the company develop. A loyal employee might want to see a company develop because he cares, so will be a stakeholder. Some employees hold shares in the company, which means they have an interest in doing well and growing their investment. Some employees, of course, are in for their pay packet and nothing more.
Are customers stakeholders? In a lot of ways, I'd argue no, unless you hold shares in Sega or are an employee as well. If you really care about a company, then you could be considered a stakeholder as you too would suffer if it suffers.
Stakeholders hold stakes for different reasons and even stakeholders will have different desires. A loyal employee or caring customer wants to see a company do well both financially and reputationally. A shareholder cares more about financial results.
There are others, like the government, unions, regulators and auditors who would fall into the categories of "interested parties", but not all will have stakes in the company. In a lot of ways, some of these wouldn't be too concerned if the company failed, as long as the company wasn't too large, of course.