Applied via the website and was contacted about two weeks later for a phone interview. I went through that with only one interviewer.

Overall, the phone interview was probably 50% general questions about me and my interest in the position, 25% technical, and 25% me asking questions of the interviewer.

At the end of the interview, I was told I would be sent a programming test. I received that the next day and began working on it. It took me about a week to do, then I sent that in. They got back to me about two weeks later for an in-person interview.

Initially, I met with HR and they had me do a sit-down test. Obviously, I can't say what the questions were, but overall they were good, broad questions that should generally be easy to answer (except a couple that might require some thinking). Basically, as long as you "got" everything you learned at university, you should be more than fine. Be sure to study everything that appears in the job description.

After that, HR took me for a tour around the campus. The offices were very relaxed and well-decorated, and it was a lot of fun. Then I went to a lunch interview with a couple of employees, then met with two others for an interview in the offices, then one more (again, supposed to be two), and finally hung out with one last person and got to ask a lot of questions about working at Blizzard.

I heard back the next week that I would be receiving an offer.

I won't give any specific examples. Follow my advice and you should be fine.