In case you needed a quick primer on the who's who and what's what of the role-playing genre, or just want something pretty to hang on the fridge, here's The Kotaku Genre Guide to Role-Playing Games.
Consider this a round-up of some of the key info you need to know to stay abreast of the role-playing game genre. You've got the top-ranked games, a field guide to RPG sub-genres, and a look at some of the key figures who've made the RPG business what it is today, for better or for worse.