The Elder Scrolls IV: Oblivion

Oblivion is the fourth title in Bethesda's popular Elder Scrolls series.

The continent of Tamriel is threatened by the Daedra Prince of Destruction, Mehrunes Dagon. The Emperor Uriel Septim and his three heirs were assassinated. You, a former prisoner in the Imperial Dungeons, were entrusted the Amulet of Kings by the emperor himself, and the primary quest is to find his illegitimate son, the last of the Septim bloodline. The world hangs in the balance, the Septims and the Amulet was the last barrier between Oblivion and Tamriel.

Oblivion sticks to the style of its predecessors featuring action-based combat, first person and third person views, and "free roam". Your chosen race and class determine the abilities you have in the beginning. The game lets you play multiple types of characters but you are not limited to a specific role. By completing quests, your character can be a Mage, Fighter and Thief.