Dungeons & Dragons
I haven't played Dungeons & Dragons since I was a teen, but I've always had a love for the novels and books. I never thought I'd get a chance to contribute to the game, but I have a piece in Collective Encounters Vol. 5, which just released today. There are dozens of one-page encounters that can be used in larger campaign settings, so if you're a D&D player, you can check it out here.