Gaming wasn't a huge thing when I was young and as a young adult trying it I found myself too immersed in it, so I mostly stayed away. It's really nice to see a positive article about how gaming friends helped you cope.
Interestingly, in my newest novel, when one of the characters dies, his WoW friends do an online funeral for him and create a highlight "reel" of his best games. It's cool to know that this sort of thing really does happen!
I hope you're now at peace with your grandfather's passing, and if not, I wish that for you soon.