in March 2006 what I would like to mention as one of the first blockbusters for the 360 (the others being Call of Duty 2 and Ghost Recon Advanced Warfighter) The Elders Scroll IV Oblivion was the second adaptation of the series to home consoles and it did a fine job by offering a huge world filled with exploration and adventure, the game was heavily criticized specially by people who are used to play on PC, but the magnitude and lenght of the adventure was moswtly unprecedented in home consoles (aside from Morrowind).

The Game featured skill improvement as it's level base, it also had scalation on the game world so you could explore as you saw fit, smithing, crafting spells, alchemy, combat, magic, potions, armor, stealth, it was all there, a darker world called Oblivion (think of it as Mordor from Lord of the Rings) an extensive suply of quests to do and things to discover, from saving the empire to investigate ghost ships, get inside paintings, hunting for ogres. etc.