Deus Ex: Human Revolution. That's right.
It wasn't a bad game at all, but the game was hyped in a way that wasn't really true to the product. It seemed like they were trying to sell us on a great story, with branching paths to objectives (implied to be like Deus Ex as opposed to Invisible War), and a strong theme about what it is that makes us human.
The actual game had this pretentious swagger to it, like it was trying to tell some kind of great story with deep characters, but I never saw that depth actually show. At best the game was on the level of an above average action movie. All those shots of Jensen sitting around thinking about what he's become didn't factor into the final game - ten minutes in he's fully augmented and about 150% more awesome at everything than before. What's the downside?
The combat was tight and the art was fantastic, but the "branching path" gameplay felt identical to Invisible War. You could either fight everyone in the room, or take the one air duct that leads DIRECTLY to the computer terminal you need to hack. I remember Deus Ex having maintenance shafts, catwalks, ventilation systems that almost comprised their own level. It felt like you were actually planning an assault on a functioning facility as opposed to following a linear "stealth path".
Anyway, I'm aware that Human Revolution was a good game, but I had gotten my hopes up for something groundbreaking, in either the story or gameplay department, and it simply did not deliver that.