BackFire
Blood. It's nature's lube
Assassin's Creed, for being a genuinely bad game in so many huge ways when it could have been astounding as a whole if more work went into the fundamentals and basics instead of the animations and graphics.
FFXII, for lacking that emotional center that the great FF game's are known for, also for lacking well developed, interesting characters that feel organically important in context to the adventure as a whole.
FFVIII, for the same reasons as FFXII but also because the draw system was atrocious, the reliance on GF's were annoying and forced the player to watch too many summon animations, and the romantic relationship between Squall and Rinoa felt contrived to work because of convenience, and not because the characters really connected.
Gears of War, I love this game very much, but the story is what disappointed me. I was very excited about the plot, and thought that the world would have a very interesting back story. Though, the plot itself was barebones and generic, barely working on a level beyond simply moving you from point A to point B and so on.