Deus Ex: Human Revolution Augmented Edition. It's mostly because the game doesn't come in it's own blu ray case. Every other one of my collector's editions I can easily display and stack neatly in the current space situation I have with my shelving. With this game, I have to set apart from the others
I have quite a few Collector's Edition and some of them are simply overrated. Take for example of Metal Gear Solid 4: Guns of the Patriots. All you get is a soundtrack (not complete edition) and a short documentary on Blu-Ray. There was also Modern Warfare 2 with an artbook and free download for Call of Duty HD (horrible port).