I feel that every gamer has one or two universes that he/she knows nearly all there is to know about. With huge riveting worlds such as Warhammer, Elder Scrolls and Warcraft, I ask my fellow gamers, which ones have you given the most to? Which ones have you delved into books and general backstory to learn the most you can? Which universes do you know better than you know your spouse?
For me, it's Halo. From the Ur-Didact's war with the Lord of Admirals and eventual discovery of the Primordial and the Flood, to the augmentation of the Spartan-II's and glassing of Reach, I know nearly all of it. I still need to read the Kilo-Five Trilogy, and I will in due time.