i heard 15 to 20 hours from Gamespot.... and they also said it was pretty easy on all difficulty levels
"They come as men, as graven images, as the White Stone, as a whirlwind and as a cloud;
it is a fire unfolding itself, the color amber; they are now in the Heavens looking over thee."
"When the bomb drops it'll be a bank holiday
Everybody happy in their tents and caravans
Everybody happy in their ignorance and apathy
No one realizes until the television breaks down..."