Pete Hines, spokesman for Bethesda has announced the downloadable content planned for Fallout 3 will be several hours long and will consist of an entirely new quest line.

"We want stuff that's going to be several hours. Not just like a one-off thing, but something like where you can download it and play it for X number of hours," Hines stated when speaking to ShackNews.

"It'll be similar to what we did with Knights of the Nine in Oblivion, where it's like whole new quest lines, new stuff, that kind of thing.

"We want to do stuff like that, where it's adding hours of tangible stuff to the experience. And it plugs into your existing game, so whether you're starting a new game, or you're playing for 40 hours, you can go off and play this," Hines stated.

It was previously announced that Fallout 3’s DLC will only available on Xbox 360 and PC. It was also hinted that there has already been a significant amount of work done on the content.

 "We stopped doing content a pretty good way before we finished the game in terms of adding new stuff. So we already have folks starting to look into what [the DLC] might be," added Hines.

Fallout 3, the much-anticipated mature post-apocalyptic RPG, is scheduled for release on 31st October this year.

Head over to our Fallout 3 hub for more info.