I'm a gigantic pervert and I like Half-Life!
So Moonshadow is a name I've used on forums forever. There's no origin story, it's just a couple of words that my teenage boy self thought sounded pretty cool.
At one point, someone said to me, "That's stupid. The moon doesn't even have a shadow!"
And I thought, "Yeah, it does, that's what an eclipse is! When the moon's shadow is cast over the earth!"
So now I associate my forum name with solar eclipses and associated imagery.
Because I drew it and it is video game related. Apart from Brad of course. The "I drew it part" I mean, not the "video game related" part.
Edit: I'm gonna pretend that people actually click on peoples name to see the profile pic, instead of just glancing at the avatar and say; I drew those crystals long ago, even before joining the site, and I wanted to have something else than the default so I used it as filler. Never bothered to put anything else there.