Bethesda's Elder Scrolls IV is one of the most taxing RPG games in the market so far, and is one of the best RPG's ever. Fans of the Elder Scrolls series will be pleased to know that Elder Scrolls V is more than just a rumor. They are experimenting with it as you read this, and will begin full development as soon as Fallout 3 is finished.
Source: 1Up