Mako SOLDIER said:
Philip Pullman's His Dark Materials trilogy. Not so much the ending as the story after about half way through the third book. It just falls apart and I was like "Really? That's it? All that build up, for THAT?". After 2 excellent books and more than its fair share of hype it was just massively disappointing.
What about the godawful film they made? Seriously, for the ending to THAT they decide to take out the entire climactic ending of the book and save it for the next film, while having the movie ending be nothing more than a literal fade-to-black, seriously, there is no fucking ending! It just stops!
I haven't read the books in a while but I remember quite liking the books, I remember the very ending of the last book, and the last 4 words spoken "The Republic of Heaven", but not much besides that, oh except the names of Will and Lyra's Daemons.
A bad book ending from a bad book is John Steinbeck's The Grapes of Wrath, it's a crap read the entire way through but the ending does, as Yahtzee puts it, come out of nowhere like a fucking cockslap.
Bad game ending, bad game ending......Oh, I was gonna say Crackdown as well but I'll see your Crackdown and Raise you Too Human. I was expecting a lot more hours of gameplay than that.