Bethesda mouth Pete Hines has said Fallout 3 will have a much smaller game world than Oblivion - around 50 to 80 per cent of its size.
"The world is much smaller than Oblivion, but packed with stuff to do. We've never bothered to walk across the world, but it's between 50 to 80 per cent of the size of Oblivion," Hines told Gameplayer.
"One thing we did well in Oblivion was the relative distance between you and things to do in the world. Drop a ball on the map and there's stuff to do within a certain distance. A world of endless space and meaningless walking is just not fun."
It reinforces what he told Eurogamer last August - that Fallout 3 will be much more freeform than Oblivion and will revolve around good/evil choices, with nine to 12 different endings to suit various play styles.
He also revealed that the main quest will be about 20 hours long, with 20 hours of side-quests and a yet-to-be-determined amount of hours for miscellaneous quests. Unlike Oblivion, you will have to play through at least a couple of times to unlock all the Achievements, too .
Fallout 3 is a post-apocalyptic role-playing game that sees you exploring a world devastated by nuclear bombs and strange scientists.
Among its boasts are fancy graphics and a combat system where you queue up a string of attacks rather than standing there swinging your sword aimlessly for five minutes.