#11: The Elder Scrolls IV: Oblivion: Game of the Year Edition
Why It's Great: "Massive" isn't a big enough word for the fourth incarnation in the popular Elder Scrolls role-playing series. As you traversed the world of Cyrodil, you could truly create a life of your own - mine caverns, learn trade skills, fight bandits... the scope alone of what's possible in Oblivion is simply astonishing, and this amazing adventure is still unprecedented in both size and scale.
