Usually when a company declines to release a demo for a pc game; they have something to hide. Normally that the game they are planning on releasing isn't all that great, and they don't want to put people off by letting them play a trial of the game. Hopefully this is not the case with the long awaited Fallout 3, as Bethesda have been telling people that there will be no demo for the game, apparently because it would be hard to split the game up for a demo version.

Via Eurogamer