a few moments ago, Totalbiscuit posted a link on his twitter feed on a poll conducted by the guinness world records 2K12: gamers edition concerning the games with the best ending. http://www.digitalspy.co.uk/gaming/n...me-ending.html
in this poll, Call of Duty: Black Ops was voted the game with the best ending, a rather controversial opinion.
Firstly, what do you call "the ending"? do you just mean the final cinematic? in that case, Portal 2, Arkham City, Assassin's creed 2, brotherhood and revelations, and even Mass effect 1 are also decent contenders. hell, even the cutscene at the end of the lich king fight could qualify. do you mean the best final level? what about Mass effect 2, Warcraft 3: TFT, Half Life 2 and even vanilla WoW (kel'thuzad) and TBC (Vashj, Kael'thas, Illidan, Kil'jaeden)?
personally, i haven't played Black ops, so i'm not quite sure on this. however, i do know that there are a lot of games out there with a better story. and reading through the comments, i'm fairly sure that i'm not the only one with this opinion.