My suggestion to you would be to start pumping out games that you make to show off what you can do. This will also help you think about how games are made, and where the pain points are in development. This knowledge will truly help you in any interview.
Start with small games too... don't try to build a MMO. Make clones of old Atari games .... things that you can actually complete in a few months so that you don't get discouraged.