So read this http://www.gamespresso.com/360/destiny-on-xbox-one-requires-a-massive-40gb-of-storage/ Wow, others were saying 18gb on x1, so now I'm worried my 20gig hdd on my x360 is not going hold the game. For pre orders and stuff you'd think they'd be obligated to tell you the install size, because they really would determine whether your console can even fit the game on it or not.