Elder Scrolls IV: Oblivion, is the latest in the series from Bethesda Softworks in their award-winning first-person role-playing games. That's the short explanation, but for a better fit and detail I steal directly from their own website to clue everyone in.

Oblivion is a single-player game that takes place in Tamriel's capital province, Cyrodiil. You are given the task of finding the hidden heir to a throne that sits empty, the previous emperor having been killed by an unknown assassin. With no true Emperor, the gates to Oblivion (the equivalent of hell in the world of Tamriel) open, and demons begin to invade Cyrodiil and attack its people and towns..



Link: Gaming Groove