There is a feeling I get from game conventions that thrills me like only a handful of others in this life. It's the same feeling I get when inside a packed hobby-gaming store, surrounded by Pokemon tournamenteers and nerds debating the latest over-powered character class from the latest Rifts RPG sourcebook. It's rooted both in current geeky passion and in the hazy joy of nostalgia, from when my dad first woke me up in the middle of the night to play "Space Turkeys" on the Intellivision,...