Verically, yes. Horizontally, it depends on how many multi-disc jewel cases you have compared to singles. The more multi-disc games you have, the more horizontal space you can save by switching to DVD cases that hold up to 3 or 4 discs. I actually saved horizontal space on a Billy bookshelf by switching (I have a lot of Squaresoft games), then was able to start putting my PS2 games right next to them and have them look totally natural next to each other.