Applied for a different position there. Had the exact same problem about not being a gamer, but I had at least watched the original LoL championships at Staples and sporadic tournaments since then.

My fatal flaw was that I asked about work-life balance. They had none. The team I was being recruited to worked 10-12 hour days, 7 days a week. They weren't programmers, or artists, or involved in the development of LoL in any way. They didn't even actually have the workload to justify those hours. They spent that much time in the office just cause. I think they framed it as "supporting the developers" or some silly bullshit like that.

I declined the next interview. They kept calling me for a few weeks after that. Apparently I had gone further than anyone else they had tried to recruit to that position in some time.