AAAAAAAAAAAAAAAAAAAAAAAA

I'm not entirely sure, but I think it all started from a collective idea from the fandom about Luna returning from the moon after 1000 years and not being used to any of the modern tech the ponies might have, video games being a big part of that. After trying some games out for a bit, though, she gets hooked and can't stop playing.And thus, Gamer Luna was born.