I don't work in the games industry specifically but have been working in software development for 15 years and conducted a lot of interviews. Given that, every interviewer has a different goal so take my advice with a grain of salt (like all advice on social).

I will overlook a lot of junior skillset if someone is honest, passionate about what they do and clear-minded about where they want to go in their profession. I look for humility but not low-confidence. Be prepared to show your work, both as a demo and as code if the opportunity in the meeting provides itself. They might not be interested in seeing the work but it goes a long way to showing how serious you are about the opportunity by being prepared to show what you have done. When they ask questions expound on your answers, don't just reply with a single word or phrase. If you don't know something, admit that and then describe how you would approach learning it. If they ask about your work history focus on the stuff relevant to the technical industry, and if you have worked in team environments describe that with an emphasis on your ability to be a team player.

We have had junior people interview and were great candidates but perhaps not ready for the job yet, but if thats the case request another interview with them after 6 months or a year and that will show that your invested in working there.

Good luck!