I applied towards the end of the internship open application period in November of 2017. After the open period ended at the end of December, I received a screening email on February 14th of 2018. The initial email just had a few simple questions that seemed to determine whether or not I was still a qualified candidate for the internship, such as whether I planned on enrolling in another semester of college post-internship period, whether I was still available to move for the duration of the internship, and what my experience with Blizzard games and Battle.net had been thus far (the position I was contacted about was within Battle.net).
After responding to the email, I received a follow-up email from a specific recruiter about 24-48 hours later. This email detailed the date and time of my first two interviews, for the following week (the initial emails occurred towards the end of a work week).
Both interviews were perfectly punctual and professional. Both of the interviewers were eloquent, asked relevant questions about my experience, my interest in the role and Blizzard as a whole. The first half of both interviews seemed more focused on getting to know me as a candidate, and then they transitioned into asking situational questions where they were looking for specific answers or experience to fill the need their specific teams had (each interview was from a different team). The first two interviews were on Monday and Tuesday, and late Wednesday evening, I received another email from my recruiter stating that a third interview had been requested. We scheduled for Thursday, the following day.
The third interview went extremely well. The interviewer was just as well-spoken and thorough as the first two, but he was much more open and easy-to-read about how I was performing throughout the interview. The third interview contained more specific situational questions, though it did feel more like a conversation - something I'm not sure whether it was a product of the interviewer himself or the set up of the interview process overall. At the end, he explained that I did very well and would likely be hearing back soon.
Monday of the following week, I received a call with my offer. Overall, it was an extremely pleasant experience. Both recruiters that assisted me were friendly, communicative, and informative. All three interviewers were extremely professional and at no point in time showed any bias or dismissive behaviors. In fact, after describing their roles and listening to my experience and answers, they all confirmed with me whether or not I was still interested in the role in question.
Interns are rarely, if ever, brought to HQ to be interviewed in person, so I have no input on how that process works.
